Number Series MCQs

What is Number Series?

Number series is a arrangement of numbers in a certain order, where some numbers are wrongly put into the series of numbers and some number is missing in that series, we need to observe and find the accurate number to the series of numbers.

In competitive exams number series are given and where you need to find missing numbers. The number series are come in different types. At first you have to decided what type of series are given in papers then according with this you have to use shortcut tricks as fast as you can .

Q.Look at this series: 2, 1, (1/2), (1/4), … What number should come next?
A.(1/3)
B.(1/8)
C.(2/8)
D.(1/16)
Answer: Option B
Explanation:
This is a simple division series; each number is one-half of the previous number.
In other terms to say, the number is divided by 2 successively to get the next result.
4/2 = 2
2/2 = 1
1/2 = 1/2
(1/2)/2 = 1/4
(1/4)/2 = 1/8 and so on.

Q.Look at this series: 7, 10, 8, 11, 9, 12, … What number should come next?
A.7
B.10
C.12
D.13
Answer: Option B
Explanation:
This is a simple alternating addition and subtraction series. In the first pattern, 3 is added; in the second, 2 is subtracted.

Q.Look at this series: 36, 34, 30, 28, 24, … What number should come next?
A.20
B.22
C.23
D.26
Answer: Option B
Explanation:
This is an alternating number subtraction series. First, 2 is subtracted, then 4, then 2, and so on.

Q.Look at this series: 22, 21, 23, 22, 24, 23, … What number should come next?
A.22
B.24
C.25
D.26
Answer: Option C
Explanation:
In this simple alternating subtraction and addition series; 1 is subtracted, then 2 is added, and so on.

Q.Look at this series: 53, 53, 40, 40, 27, 27, … What number should come next?
A.12
B.14
C.27
D.53
Answer: Option B
Explanation:
In this series, each number is repeated, then 13 is subtracted to arrive at the next number.

Q.Look at this series: 80, 10, 70, 15, 60, … What number should come next?
A.20
B.25
C.30
D.50
Answer: Option A
Explanation:
This is an alternating addition and subtraction series. In the first pattern, 10 is subtracted from each number to arrive at the next. In the second, 5 is added to each number to arrive at the next.

Q.Look at this series: 2, 6, 18, 54, … What number should come next?
A.108
B.148
C.162
D.216
Answer: Option C
Explanation:
This is a simple multiplication series. Each number is 3 times more than the previous number.

 

Number Series Reasoning- Tricks With Question

Number series reasoning Tricks involves identifying the pattern or rule governing a sequence of numbers and using that rule to predict the next number in the series. Here are some common tricks and strategies to excel at number series reasoning:

  1. Identify the Pattern: The first step is to carefully examine the series and try to identify any patterns or relationships between the numbers. Look for arithmetic, geometric, or other mathematical operations that may be at play.
  2. Arithmetic Series: In an arithmetic series, each number is obtained by adding (or subtracting) a constant value to the previous number. Look for a consistent difference between consecutive numbers. Once you find the common difference, apply it to the last number to find the next one.Example: 2, 5, 8, 11, … Common Difference: 3 Next Number: 11 + 3 = 14
  3. Geometric Series: In a geometric series, each number is obtained by multiplying (or dividing) the previous number by a constant value. Look for a consistent ratio between consecutive numbers. Once you find the common ratio, apply it to the last number to find the next one.Example: 2, 6, 18, 54, … Common Ratio: 3 Next Number: 54 x 3 = 162
  4. Square and Cube Patterns: Sometimes, series may involve squaring or cubing numbers. Pay attention to these patterns and apply them to the last number to find the next one.Example: 2, 4, 16, 256, … Next Number: 256 x 16 = 4096
  5. Prime Numbers: Occasionally, series may be based on prime numbers or a combination of prime numbers. Check if the numbers in the series follow any prime number sequence.Example: 2, 3, 5, 7, … Next Number: 11 (next prime number)
  6. Combination of Operations: Some series may involve a combination of arithmetic, geometric, or other mathematical operations. Break down the series into simpler sub-patterns and work on them separately before combining the results.
  7. Look for Alternating Patterns: In some series, you may find alternating patterns. For example, one pattern for odd-indexed terms and another for even-indexed terms. Identify and apply the appropriate pattern for the next term.
  8. Check for Squares and Cubes of Digits: Sometimes, series may involve squaring or cubing the digits of numbers. For example, in the series 9, 16, 25, 36, … each number is a square of the digits 3, 4, 5, 6, respectively.
  9. Trial and Error: If you can’t immediately spot a pattern, try different mathematical operations or combinations until you find one that fits the given series. Be systematic in your approach and eliminate unlikely possibilities.
  10. Practice Regularly: The more you practice number series reasoning, the better you’ll become at recognizing patterns quickly. Practice with various types of series to improve your skills.

 

Number Series Completion – MCQ Questions and Answers

These MCQs test various patterns commonly found in number series reasoning problems, including arithmetic progression, geometric progression, squares, prime numbers, and more. Practice with such questions can help improve your skills in solving number series problems.

Question 1: What is the next number in the series: 2, 4, 8, 16, …?

A) 24
B) 32
C) 64
D) 128

Answer 1: B) 32

Explanation: This is a geometric series where each number is obtained by multiplying the previous number by 2. So, to find the next number, you would multiply 16 by 2, which equals 32.


Question 2: What is the missing number in the series: 3, 6, 12, ?, 48?

A) 15
B) 24
C) 36
D) 24

Answer 2: B) 24

Explanation: This is an arithmetic series where each number is obtained by doubling the previous number. To find the missing number, double 12, which equals 24.


Question 3: What is the next number in the series: 5, 10, 20, 40, …?

A) 60
B) 80
C) 100
D) 120

Answer 3: C) 100

Explanation: This is a geometric series where each number is obtained by multiplying the previous number by 2. To find the next number, multiply 40 by 2, which equals 80.


Question 4: What is the missing number in the series: 1, 4, 9, ?, 25?

A) 12
B) 13
C) 16
D) 18

Answer 4: C) 16

Explanation: This series represents the squares of consecutive positive integers. To find the missing number, calculate the square of 4, which is 16.


Question 5: What is the next number in the series: 2, 3, 5, 7, …?

A) 8
B) 9
C) 10
D) 11

Answer 5: D) 11

Explanation: This series consists of prime numbers, starting from 2. To find the next number, identify the next prime number after 7, which is 11.


Question 6: What is the missing number in the series: 10, 20, 40, 80, ?, 320?

A) 160
B) 200
C) 240
D) 280

Answer 6: A) 160

Explanation: This is a geometric series where each number is obtained by doubling the previous number. To find the missing number, double 80, which equals 160.

 

Question 7: What is the next number in the series: 1, 4, 9, 16, …?

A) 24
B) 25
C) 36
D) 49

Answer 7: D) 49

Explanation: This series represents the sequence of perfect squares of consecutive positive integers. To find the next number, calculate the square of 5, which is 25.


Question 8: What is the missing number in the series: 12, 18, 24, ?, 36?

A) 28
B) 30
C) 32
D) 34

Answer 8: B) 30

Explanation: This is an arithmetic series where each number is obtained by adding 6 to the previous number. To find the missing number, add 6 to 24, which equals 30.


Question 9: What is the next number in the series: 2, 6, 18, 54, …?

A) 108
B) 162
C) 216
D) 324

Answer 9: B) 162

Explanation: This is a geometric series where each number is obtained by multiplying the previous number by 3. To find the next number, multiply 54 by 3, which equals 162.


Question 10: What is the missing number in the series: 3, 8, 15, ?, 33?

A) 20
B) 21
C) 24
D) 27

Answer 10: B) 21

Explanation: This series represents the sequence of consecutive positive integers squared and then decreased by 1. To find the missing number, square 5 (the next positive integer), which is 25, and then subtract 1, resulting in 24.

Quiz Based on Number Series Tricks

Question 11: What is the next number in the series: 1, 4, 9, 16, 25, …?

A) 36
B) 49
C) 64
D) 81

Answer 11: B) 49

Explanation: This series represents the sequence of perfect squares of consecutive positive integers. To find the next number, calculate the square of 6, which is 36.


Question 12: What is the missing number in the series: 10, 18, 26, 34, ?, 50?

A) 36
B) 38
C) 40
D) 42

Answer 12: B) 38

Explanation: This is an arithmetic series where each number is obtained by adding 8 to the previous number. To find the missing number, add 8 to 34, which equals 42.


Question 13: What is the next number in the series: 3, 9, 27, 81, …?

A) 162
B) 243
C) 324
D) 729

Answer 13: B) 243

Explanation: This is a geometric series where each number is obtained by multiplying the previous number by 3. To find the next number, multiply 81 by 3, which equals 243.


Question 14: What is the missing number in the series: 5, 10, 20, 40, 80, …?

A) 160
B) 180
C) 200
D) 220

Answer 14: A) 160

Explanation: This is a geometric series where each number is obtained by doubling the previous number. To find the missing number, double 80, which equals 160.


Question 15: What is the next number in the series: 2, 5, 10, 17, …?

A) 24
B) 25
C) 32
D) 33

Answer 15: D) 33

Explanation: This series represents consecutive prime numbers starting from 2. To find the next number, identify the next prime number after 17, which is 19.

 

Question 16: What is the missing number in the series: 3, 6, 12, 24, ?, 96?

A) 36
B) 48
C) 64
D) 72

Answer 16: B) 48

Explanation: This is a geometric series where each number is obtained by multiplying the previous number by 2. To find the missing number, multiply 24 by 2, which equals 48.


Question 17: What is the next number in the series: 4, 9, 16, 25, 36, …?

A) 42
B) 49
C) 64
D) 81

Answer 17: B) 49

Explanation: This series represents the sequence of perfect squares of consecutive positive integers. To find the next number, calculate the square of 7, which is 49.


Question 18: What is the missing number in the series: 7, 14, 28, ?, 112?

A) 42
B) 56
C) 70
D) 84

Answer 18: B) 56

Explanation: This is an arithmetic series where each number is obtained by doubling the previous number. To find the missing number, double 28, which equals 56.


Question 19: What is the next number in the series: 2, 4, 16, 256, …?

A) 1024
B) 2048
C) 4096
D) 8192

Answer 19: C) 4096

Explanation: This series represents an exponential growth pattern where each number is obtained by squaring the previous number. To find the next number, square 256, which equals 4096.


Question 20: What is the missing number in the series: 1, 3, 7, 15, ?, 31?

A) 17
B) 19
C) 21
D) 23

Answer 20: C) 21

Explanation: This series represents a pattern where each number is obtained by adding the next odd number. To find the missing number, add 8 to 15, which equals 23.

Question 21: What is the next number in the series: 6, 12, 24, 48, …?

A) 64
B) 96
C) 72
D) 144

Answer 21: B) 96

Explanation: This is a geometric series where each number is obtained by doubling the previous number. To find the next number, double 48, which equals 96.


Question 22: What is the missing number in the series: 11, 15, 23, ?, 47?

A) 29
B) 31
C) 33
D) 37

Answer 22: B) 31

Explanation: This is an arithmetic series where each number is obtained by adding consecutive prime numbers (2, 4, 6, …). To find the missing number, add 8 to 23, which equals 31.


Question 23: What is the next number in the series: 2, 4, 8, 16, 32, …?

A) 48
B) 64
C) 128
D) 256

Answer 23: C) 128

Explanation: This is a geometric series where each number is obtained by multiplying the previous number by 2. To find the next number, multiply 32 by 2, which equals 128.


Question 24: What is the missing number in the series: 9, 16, 25, 36, ?, 64?

A) 49
B) 56
C) 61
D) 81

Answer 24: A) 49

Explanation: This series represents the sequence of perfect squares of consecutive positive integers. To find the missing number, calculate the square of 7, which is 49.


Question 25: What is the next number in the series: 1, 3, 9, 27, …?

A) 81
B) 64
C) 36
D) 18

Answer 25: A) 81

Explanation: This is a geometric series where each number is obtained by multiplying the previous number by 3. To find the next number, multiply 27 by 3, which equals 81.

 

Question 26: What is the next number in the series: 12, 24, 48, 96, …?

A) 120
B) 144
C) 192
D) 240

Answer 26: C) 192

Explanation: This is a geometric series where each number is obtained by multiplying the previous number by 2. To find the next number, multiply 96 by 2, which equals 192.


Question 27: What is the missing number in the series: 5, 12, 27, 58, ?, 170?

A) 83
B) 92
C) 107
D) 124

Answer 27: A) 83

Explanation: This series represents a pattern where each number is obtained by adding consecutive powers of 2 (1, 2, 4, …). To find the missing number, add 25 to 58, which equals 83.


Question 28: What is the next number in the series: 3, 8, 18, 38, …?

A) 76
B) 78
C) 80
D) 82

Answer 28: C) 80

Explanation: This series represents an arithmetic progression where each number is obtained by adding consecutive even numbers (2, 4, 6, …). To find the next number, add 42 to 38, which equals 80.


Question 29: What is the missing number in the series: 4, 7, 13, 22, ?, 46?

A) 28
B) 31
C) 34
D) 37

Answer 29: B) 31

Explanation: This series represents an arithmetic progression where each number is obtained by adding consecutive prime numbers (3, 5, 7, …). To find the missing number, add 9 to 22, which equals 31.


Question 30: What is the next number in the series: 10, 19, 37, 73, …?

A) 146
B) 146
C) 146
D) 146

Answer 30: A) 146

Explanation: This series represents a pattern where each number is obtained by doubling the previous number and then subtracting 1. To find the next number, double 73 (146) and subtract 1.

 

Question 31: What is the next number in the series: 6, 10, 18, 34, …?

A) 50
B) 66
C) 74
D) 82

Answer 31: B) 66

Explanation: This series represents an arithmetic progression where each number is obtained by adding consecutive even numbers (4, 8, 16, …). To find the next number, add 32 to 34, which equals 66.


Question 32: What is the missing number in the series: 20, 28, 40, ?, 70?

A) 52
B) 56
C) 60
D) 64

Answer 32: C) 60

Explanation: This series represents an arithmetic progression where each number is obtained by adding 8 to the previous number. To find the missing number, add 20 to 40, which equals 60.


Question 33: What is the next number in the series: 5, 11, 23, 47, …?

A) 94
B) 95
C) 96
D) 97

Answer 33: A) 94

Explanation: This series represents a pattern where each number is obtained by doubling the previous number and then subtracting 1. To find the next number, double 47 (94) and subtract 1.


Question 34: What is the missing number in the series: 8, 12, 20, 32, ?, 68?

A) 48
B) 52
C) 56
D) 60

Answer 34: A) 48

Explanation: This series represents an arithmetic progression where each number is obtained by adding 4 to the previous number. To find the missing number, add 12 to 32, which equals 48.


Question 35: What is the next number in the series: 9, 16, 25, 36, …?

A) 42
B) 49
C) 56
D) 64

Answer 35: B) 49

Explanation: This series represents the sequence of perfect squares of consecutive positive integers. To find the next number, calculate the square of 7, which is 49.

 

Question 36: What is the next number in the series: 3, 7, 15, 31, …?

A) 47
B) 63
C) 79
D) 95

Answer 36: C) 79

Explanation: This series represents a pattern where each number is obtained by doubling the previous number and then adding 1. To find the next number, double 31 (62) and then add 1, which equals 63.


Question 37: What is the missing number in the series: 6, 15, 35, ?, 105?

A) 55
B) 60
C) 70
D) 80

Answer 37: B) 60

Explanation: This series represents a pattern where each number is obtained by multiplying the previous number by 2 and then adding 5. To find the missing number, multiply 35 by 2, which is 70, and then subtract 10 (5 + 5), which equals 60.


Question 38: What is the next number in the series: 2, 7, 16, 29, …?

A) 42
B) 49
C) 58
D) 71

Answer 38: D) 71

Explanation: This series represents an arithmetic progression where each number is obtained by adding consecutive prime numbers (5, 9, 13, …). To find the next number, add 42 to 29, which equals 71.


Question 39: What is the missing number in the series: 4, 9, 16, 25, ?, 49?

A) 30
B) 32
C) 36
D) 40

Answer 39: C) 36

Explanation: This series represents the sequence of perfect squares of consecutive positive integers. To find the missing number, calculate the square of 6, which is 36.


Question 40: What is the next number in the series: 8, 24, 48, 80, …?

A) 112
B) 120
C) 128
D) 136

Answer 40: A) 112

Explanation: This series represents a pattern where each number is obtained by adding consecutive even numbers (16, 24, 32, …). To find the next number, add 32 to 80, which equals 112.

 

Question 41: What is the next number in the series: 11, 13, 17, 19, …?

A) 21
B) 23
C) 27
D) 29

Answer 41: B) 23

Explanation: This series represents a pattern where each number is obtained by adding consecutive prime numbers (2, 4, 2, …). To find the next number, add 4 to 19, which equals 23.


Question 42: What is the missing number in the series: 3, 9, 27, 81, ?, 243?

A) 108
B) 135
C) 162
D) 216

Answer 42: C) 162

Explanation: This series represents a geometric progression where each number is obtained by multiplying the previous number by 3. To find the missing number, multiply 81 by 3, which equals 162.


Question 43: What is the next number in the series: 4, 7, 11, 16, …?

A) 18
B) 19
C) 20
D) 21

Answer 43: B) 19

Explanation: This series represents an arithmetic progression where each number is obtained by adding consecutive positive integers (3, 4, 5, …). To find the next number, add 5 to 16, which equals 21.


Question 44: What is the missing number in the series: 5, 14, 41, ?, 149?

A) 68
B) 77
C) 86
D) 95

Answer 44: B) 77

Explanation: This series represents a pattern where each number is obtained by multiplying the previous number by 3 and then subtracting 1. To find the missing number, multiply 41 by 3, which is 123, and then add 10 (subtracting 1 from 123), which equals 77.


Question 45: What is the next number in the series: 2, 6, 12, 20, …?

A) 30
B) 32
C) 36
D) 40

Answer 45: A) 30

Explanation: This series represents an arithmetic progression where each number is obtained by adding consecutive even numbers (4, 6, 8, …). To find the next number, add 10 to 20, which equals 30.

 

Question 46: What is the next number in the series: 1, 3, 9, 27, …?

A) 36
B) 54
C) 81
D) 108

Answer 46: C) 81

Explanation: This series represents a geometric progression where each number is obtained by multiplying the previous number by 3. To find the next number, multiply 27 by 3, which equals 81.


Question 47: What is the missing number in the series: 10, 15, 25, 40, ?, 85?

A) 55
B) 60
C) 65
D) 70

Answer 47: B) 60

Explanation: This series represents an arithmetic progression where each number is obtained by adding consecutive multiples of 5 (5, 10, 15, …). To find the missing number, add 15 to 40, which equals 55.


Question 48: What is the next number in the series: 8, 16, 32, 64, …?

A) 128
B) 256
C) 512
D) 1024

Answer 48: A) 128

Explanation: This series represents a geometric progression where each number is obtained by doubling the previous number. To find the next number, double 64, which equals 128.


Question 49: What is the missing number in the series: 6, 12, 21, 33, ?, 60?

A) 45
B) 50
C) 48
D) 55

Answer 49: C) 48

Explanation: This series represents an arithmetic progression where each number is obtained by adding consecutive positive integers (6, 9, 12, …). To find the missing number, add 12 to 33, which equals 45, and then add 3 (the next positive integer), which equals 48.


Question 50: What is the next number in the series: 2, 4, 7, 11, …?

A) 14
B) 15
C) 16
D) 17

Answer 50: B) 15

Explanation: This series represents an arithmetic progression where each number is obtained by adding consecutive positive integers (2, 3, 4, …). To find the next number, add 4 to 11, which equals 15.

 

Question 51: What is the next number in the series: 14, 28, 56, 112, …?

A) 168
B) 224
C) 224
D) 336

Answer 51: B) 224

Explanation: This series represents a pattern where each number is obtained by multiplying the previous number by 2. To find the next number, multiply 112 by 2, which equals 224.


Question 52: What is the missing number in the series: 2, 5, 12, ?, 30?

A) 18
B) 20
C) 22
D) 24

Answer 52: D) 24

Explanation: This series represents a pattern where each number is obtained by multiplying the previous number by 2 and then adding 1. To find the missing number, double 12 (24) and then add 1.


Question 53: What is the next number in the series: 6, 12, 25, 50, …?

A) 75
B) 100
C) 125
D) 150

Answer 53: B) 100

Explanation: This series represents a pattern where each number is obtained by doubling the previous number and then subtracting 1. To find the next number, double 50 (100) and then subtract 1.


Question 54: What is the missing number in the series: 8, 12, 17, 23, ?, 36?

A) 26
B) 27
C) 28
D) 29

Answer 54: C) 28

Explanation: This series represents an arithmetic progression where each number is obtained by adding consecutive positive integers (4, 5, 6, …). To find the missing number, add 6 to 23, which equals 29, and then subtract 1 (the next positive integer), which equals 28.


Question 55: What is the next number in the series: 3, 7, 15, 31, …?

A) 47
B) 63
C) 79
D) 95

Answer 55: C) 79

Explanation: This series represents a pattern where each number is obtained by doubling the previous number and then adding 1. To find the next number, double 31 (62) and then add 1, which equals 63.

 

Question 56: What is the next number in the series: 11, 14, 18, 23, …?

A) 27
B) 28
C) 29
D) 30

Answer 56: C) 29

Explanation: This series represents an arithmetic progression where each number is obtained by adding consecutive positive integers (3, 4, 5, …). To find the next number, add 6 to 23, which equals 29.


Question 57: What is the missing number in the series: 5, 10, 20, 40, ?, 160?

A) 80
B) 85
C) 90
D) 100

Answer 57: A) 80

Explanation: This series represents a pattern where each number is obtained by doubling the previous number. To find the missing number, double 40, which equals 80.


Question 58: What is the next number in the series: 1, 2, 6, 24, …?

A) 96
B) 120
C) 144
D) 180

Answer 58: B) 120

Explanation: This series represents a pattern where each number is obtained by multiplying the previous number by consecutive positive integers (2, 3, 4, …). To find the next number, multiply 24 by 5, which equals 120.


Question 59: What is the missing number in the series: 7, 14, 28, ?, 70?

A) 40
B) 42
C) 56
D) 60

Answer 59: C) 56

Explanation: This series represents a pattern where each number is obtained by doubling the previous number. To find the missing number, double 28, which equals 56.


Question 60: What is the next number in the series: 4, 10, 22, 46, …?

A) 82
B) 94
C) 102
D) 118

Answer 60: A) 82

Explanation: This series represents a pattern where each number is obtained by doubling the previous number and then subtracting 2. To find the next number, double 46, which is 92, and then add 2, which equals 94.

 

Question 61: What is the next number in the series: 9, 16, 25, 36, 49, …?

A) 56
B) 64
C) 81
D) 100

Answer 61: B) 64

Explanation: This series represents the sequence of perfect squares of consecutive positive integers. To find the next number, calculate the square of 8, which is 64.


Question 62: What is the missing number in the series: 12, 24, 48, ?, 192?

A) 96
B) 112
C) 144
D) 168

Answer 62: A) 96

Explanation: This is a geometric series where each number is obtained by multiplying the previous number by 2. To find the missing number, double 48, which equals 96.


Question 63: What is the next number in the series: 3, 7, 15, 31, …?

A) 47
B) 63
C) 79
D) 95

Answer 63: C) 79

Explanation: This series represents a pattern where each number is obtained by doubling the previous number and then adding 1. To find the next number, double 31 (62) and then add 1, which equals 63.


Question 64: What is the missing number in the series: 6, 18, 54, ?, 486?

A) 108
B) 162
C) 324
D) 432

Answer 64: B) 162

Explanation: This is a geometric series where each number is obtained by multiplying the previous number by 3. To find the missing number, multiply 54 by 3, which equals 162.


Question 65: What is the next number in the series: 2, 6, 18, 54, …?

A) 108
B) 162
C) 216
D) 324

Answer 65: C) 216

Explanation: This is a geometric series where each number is obtained by multiplying the previous number by 3. To find the next number, multiply 54 by 3, which equals 162.

 

Question 66: What is the next number in the series: 10, 18, 30, 46, …?

A) 60
B) 70
C) 80
D) 90

Answer 66: B) 70

Explanation: This series represents an arithmetic progression where each number is obtained by adding consecutive even numbers (8, 12, 16, …). To find the next number, add 24 to 46, which equals 70.


Question 67: What is the missing number in the series: 7, 14, 28, ?, 112?

A) 49
B) 56
C) 72
D) 84

Answer 67: B) 56

Explanation: This is a doubling pattern where each number is obtained by doubling the previous number. To find the missing number, double 28, which equals 56.


Question 68: What is the next number in the series: 3, 6, 9, 12, 15, …?

A) 16
B) 17
C) 18
D) 19

Answer 68: C) 18

Explanation: This series represents an arithmetic progression where each number is obtained by adding 3 to the previous number. To find the next number, add 3 to 15, which equals 18.


Question 69: What is the missing number in the series: 5, 9, 15, 23, ?, 41?

A) 30
B) 32
C) 35
D) 36

Answer 69: B) 32

Explanation: This is an arithmetic progression where each number is obtained by adding consecutive positive integers (4, 6, 8, …). To find the missing number, add 8 to 23, which equals 31.


Question 70: What is the next number in the series: 2, 4, 7, 11, …?

A) 14
B) 15
C) 16
D) 17

Answer 70: B) 15

Explanation: This series represents an arithmetic progression where each number is obtained by adding consecutive positive integers (2, 3, 4, …). To find the next number, add 4 to 11, which equals 15.

 

Question 71: What is the next number in the series: 12, 15, 20, 27, …?

A) 30
B) 32
C) 33
D) 35

Answer 71: A) 30

Explanation: This series represents an arithmetic progression where each number is obtained by adding consecutive positive integers (3, 5, 7, …). To find the next number, add 9 to 27, which equals 36, and then subtract 6 (the next positive integer), which equals 30.


Question 72: What is the missing number in the series: 8, 24, 72, ?, 432?

A) 144
B) 216
C) 288
D) 360

Answer 72: B) 216

Explanation: This is a geometric series where each number is obtained by multiplying the previous number by 3. To find the missing number, multiply 72 by 3, which equals 216.


Question 73: What is the next number in the series: 5, 10, 20, 40, …?

A) 60
B) 80
C) 100
D) 120

Answer 73: C) 100

Explanation: This series represents a pattern where each number is obtained by doubling the previous number. To find the next number, double 40, which equals 80, and then double it again, which equals 100.


Question 74: What is the missing number in the series: 6, 9, 15, 24, ?, 48?

A) 30
B) 33
C) 36
D) 40

Answer 74: B) 33

Explanation: This series represents an arithmetic progression where each number is obtained by adding consecutive positive integers (3, 6, 9, …). To find the missing number, add 9 to 24, which equals 33.


Question 75: What is the next number in the series: 1, 4, 9, 16, …?

A) 25
B) 36
C) 49
D) 64

Answer 75: C) 49

Explanation: This series represents the sequence of perfect squares of consecutive positive integers. To find the next number, calculate the square of 5, which is 25.

 

Question 76: What is the next number in the series: 14, 28, 56, 112, …?

A) 168
B) 224
C) 280
D) 336

Answer 76: C) 280

Explanation: This series represents a pattern where each number is obtained by multiplying the previous number by 2 and then adding the original number. To find the next number, multiply 112 by 2 and then add 112, which equals 280.


Question 77: What is the missing number in the series: 4, 16, 64, ?, 256?

A) 128
B) 144
C) 180
D) 192

Answer 77: A) 128

Explanation: This series represents a pattern where each number is obtained by squaring the previous number. To find the missing number, calculate the square of 8, which is 64.


Question 78: What is the next number in the series: 7, 14, 28, 56, …?

A) 112
B) 114
C) 116
D) 118

Answer 78: A) 112

Explanation: This series represents a pattern where each number is obtained by doubling the previous number. To find the next number, double 56, which equals 112.


Question 79: What is the missing number in the series: 10, 18, 30, ?, 66?

A) 40
B) 48
C) 52
D) 54

Answer 79: B) 48

Explanation: This series represents an arithmetic progression where each number is obtained by adding consecutive multiples of 8 (8, 12, 16, …). To find the missing number, add 18 to 30, which equals 48.


Question 80: What is the next number in the series: 5, 15, 45, 135, …?

A) 250
B) 375
C) 405
D) 500

Answer 80: B) 375

Explanation: This series represents a pattern where each number is obtained by multiplying the previous number by 3. To find the next number, multiply 135 by 3, which equals 405.

 

Question 81: What is the next number in the series: 6, 9, 12, 15, …?

A) 17
B) 18
C) 19
D) 20

Answer 81: B) 18

Explanation: This series represents an arithmetic progression where each number is obtained by adding consecutive positive integers (3, 3, 3, …). To find the next number, add 3 to 15, which equals 18.


Question 82: What is the missing number in the series: 3, 12, 48, ?, 192?

A) 72
B) 80
C) 96
D) 144

Answer 82: C) 96

Explanation: This series represents a pattern where each number is obtained by multiplying the previous number by 4. To find the missing number, multiply 48 by 4, which equals 192.


Question 83: What is the next number in the series: 9, 18, 27, 36, …?

A) 42
B) 44
C) 45
D) 48

Answer 83: C) 45

Explanation: This series represents an arithmetic progression where each number is obtained by adding consecutive positive integers (9, 9, 9, …). To find the next number, add 9 to 36, which equals 45.


Question 84: What is the missing number in the series: 5, 10, 20, ?, 80?

A) 30
B) 40
C) 50
D) 60

Answer 84: B) 40

Explanation: This series represents a pattern where each number is obtained by doubling the previous number. To find the missing number, double 20, which equals 40.


Question 85: What is the next number in the series: 1, 4, 16, 64, …?

A) 128
B) 256
C) 512
D) 1024

Answer 85: B) 256

Explanation: This series represents a pattern where each number is obtained by squaring the previous number. To find the next number, calculate the square of 8, which is 64.

Question 86: What is the next number in the series: 11, 17, 23, 29, …?

A) 35
B) 36
C) 37
D) 38

Answer 86: A) 35

Explanation: This series represents an arithmetic progression where each number is obtained by adding consecutive prime numbers (6, 6, 6, …). To find the next number, add 6 to 29, which equals 35.


Question 87: What is the missing number in the series: 2, 8, 32, ?, 128?

A) 48
B) 64
C) 72
D) 96

Answer 87: B) 64

Explanation: This series represents a pattern where each number is obtained by multiplying the previous number by 4. To find the missing number, multiply 32 by 4, which equals 128.


Question 88: What is the next number in the series: 6, 18, 54, 162, …?

A) 324
B) 486
C) 648
D) 972

Answer 88: A) 324

Explanation: This series represents a pattern where each number is obtained by multiplying the previous number by 3. To find the next number, multiply 162 by 3, which equals 486.


Question 89: What is the missing number in the series: 5, 25, 125, ?, 3125?

A) 625
B) 725
C) 825
D) 925

Answer 89: A) 625

Explanation: This series represents a pattern where each number is obtained by raising the previous number to the power of 5. To find the missing number, calculate 125 raised to the power of 5, which equals 625.


Question 90: What is the next number in the series: 4, 8, 16, 32, …?

A) 48
B) 64
C) 80
D) 96

Answer 90: B) 64

Explanation: This series represents a pattern where each number is obtained by doubling the previous number. To find the next number, double 32, which equals 64.

 

Question 91: What is the next number in the series: 12, 15, 20, 25, …?

A) 30
B) 32
C) 35
D) 40

Answer 91: A) 30

Explanation: This series represents an arithmetic progression where each number is obtained by adding consecutive positive integers (3, 5, 5, …). To find the next number, add 5 to 25, which equals 30.


Question 92: What is the missing number in the series: 8, 16, 32, ?, 128?

A) 48
B) 64
C) 72
D) 96

Answer 92: B) 64

Explanation: This series represents a pattern where each number is obtained by doubling the previous number. To find the missing number, double 32, which equals 64.


Question 93: What is the next number in the series: 5, 10, 20, 40, …?

A) 60
B) 80
C) 100
D) 120

Answer 93: C) 100

Explanation: This series represents a pattern where each number is obtained by doubling the previous number. To find the next number, double 40, which equals 80, and then double it again, which equals 100.


Question 94: What is the missing number in the series: 7, 14, 21, ?, 35?

A) 25
B) 28
C) 30
D) 32

Answer 94: B) 28

Explanation: This series represents an arithmetic progression where each number is obtained by adding consecutive positive integers (7, 7, 7, …). To find the missing number, add 7 to 21, which equals 28.


Question 95: What is the next number in the series: 1, 3, 9, 27, …?

A) 36
B) 54
C) 81
D) 108

Answer 95: C) 81

Explanation: This series represents a geometric progression where each number is obtained by multiplying the previous number by 3. To find the next number, multiply 27 by 3, which equals 81.

 

Question 96: What is the next number in the series: 10, 19, 38, 76, …?

A) 144
B) 152
C) 154
D) 160

Answer 96: C) 154

Explanation: This series represents a pattern where each number is obtained by multiplying the previous number by 2 and then adding 1. To find the next number, double 76, which equals 152, and then add 2, which equals 154.


Question 97: What is the missing number in the series: 6, 12, 24, 48, ?, 192?

A) 96
B) 102
C) 108
D) 114

Answer 97: D) 114

Explanation: This series represents a pattern where each number is obtained by multiplying the previous number by 2 and then adding 6. To find the missing number, multiply 48 by 2, which equals 96, and then add 18 (6 multiplied by 3), which equals 114.


Question 98: What is the next number in the series: 4, 9, 16, 25, …?

A) 30
B) 36
C) 42
D) 49

Answer 98: D) 49

Explanation: This series represents a sequence of perfect squares of consecutive positive integers. To find the next number, calculate the square of 6, which is 36.


Question 99: What is the missing number in the series: 8, 12, 22, 40, ?, 88?

A) 56
B) 68
C) 76
D) 84

Answer 99: B) 68

Explanation: This series represents an arithmetic progression where each number is obtained by adding consecutive multiples of 4 (4, 10, 18, …). To find the missing number, add 18 to 40, which equals 58, and then add 10 (the next multiple of 4), which equals 68.


Question 100: What is the next number in the series: 3, 6, 12, 24, …?

A) 48
B) 56
C) 64
D) 72

Answer 100: A) 48

Explanation: This series represents a pattern where each number is obtained by doubling the previous number. To find the next number, double 24, which equals 48.

 

 

Question 101: What is the next number in the series: 11, 21, 41, 81, …?

A) 121
B) 161
C) 201
D) 241

Answer 101: A) 121

Explanation: This series represents a pattern where each number is obtained by multiplying the previous number by 2 and then subtracting 1. To find the next number, double 81, which equals 162, and then subtract 41 (the previous number), which equals 121.


Question 102: What is the missing number in the series: 5, 15, 45, ?, 405?

A) 90
B) 135
C) 180
D) 270

Answer 102: B) 135

Explanation: This series represents a pattern where each number is obtained by multiplying the previous number by 3. To find the missing number, multiply 45 by 3, which equals 135.


Question 103: What is the next number in the series: 7, 14, 28, 56, …?

A) 112
B) 114
C) 116
D) 118

Answer 103: A) 112

Explanation: This series represents a pattern where each number is obtained by doubling the previous number. To find the next number, double 56, which equals 112.


Question 104: What is the missing number in the series: 10, 18, 27, ?, 45?

A) 32
B) 36
C) 39
D) 42

Answer 104: C) 39

Explanation: This series represents an arithmetic progression where each number is obtained by adding consecutive positive integers (8, 9, 10, …). To find the missing number, add 12 to 27, which equals 39.


Question 105: What is the next number in the series: 1, 5, 25, 125, …?

A) 500
B) 625
C) 750
D) 1000

Answer 105: B) 625

Explanation: This series represents a pattern where each number is obtained by multiplying the previous number by 5. To find the next number, multiply 125 by 5, which equals 625.

 

Question 106: What is the next number in the series: 9, 16, 25, 36, …?

A) 49
B) 64
C) 81
D) 100

Answer 106: A) 49

Explanation: This series represents the sequence of perfect squares of consecutive positive integers. To find the next number, calculate the square of 7, which is 49.


Question 107: What is the missing number in the series: 6, 18, 54, ?, 486?

A) 108
B) 162
C) 324
D) 432

Answer 107: B) 162

Explanation: This is a geometric series where each number is obtained by multiplying the previous number by 3. To find the missing number, multiply 54 by 3, which equals 162.


Question 108: What is the next number in the series: 4, 9, 16, 25, …?

A) 30
B) 36
C) 42
D) 49

Answer 108: D) 49

Explanation: This series represents a sequence of perfect squares of consecutive positive integers. To find the next number, calculate the square of 6, which is 36.


Question 109: What is the missing number in the series: 7, 15, 31, ?, 127?

A) 63
B) 63
C) 64
D) 65

Answer 109: C) 64

Explanation: This series represents a pattern where each number is obtained by doubling the previous number and then subtracting 1. To find the missing number, double 31 (62) and then add 1, which equals 63.


Question 110: What is the next number in the series: 3, 6, 12, 24, …?

A) 36
B) 48
C) 60
D) 72

Answer 110: B) 48

Explanation: This series represents a pattern where each number is obtained by doubling the previous number. To find the next number, double 24, which equals 48.

 

Question 111: What is the next number in the series: 13, 18, 23, 28, …?

A) 32
B) 33
C) 34
D) 35

Answer 111: A) 32

Explanation: This series represents an arithmetic progression where each number is obtained by adding 5 to the previous number. To find the next number, add 5 to 28, which equals 33.


Question 112: What is the missing number in the series: 3, 9, 27, ?, 243?

A) 54
B) 81
C) 108
D) 162

Answer 112: B) 81

Explanation: This series represents a pattern where each number is obtained by multiplying the previous number by 3. To find the missing number, multiply 27 by 3, which equals 81.


Question 113: What is the next number in the series: 2, 4, 8, 16, …?

A) 24
B) 32
C) 48
D) 64

Answer 113: B) 32

Explanation: This series represents a pattern where each number is obtained by doubling the previous number. To find the next number, double 16, which equals 32.


Question 114: What is the missing number in the series: 10, 20, 40, ?, 160?

A) 60
B) 80
C) 100
D) 120

Answer 114: B) 80

Explanation: This series represents a pattern where each number is obtained by doubling the previous number. To find the missing number, double 40, which equals 80.


Question 115: What is the next number in the series: 6, 12, 18, 24, …?

A) 30
B) 36
C) 40
D) 48

Answer 115: B) 36

Explanation: This series represents an arithmetic progression where each number is obtained by adding 6 to the previous number. To find the next number, add 6 to 24, which equals 30.

 

Question 116: What is the next number in the series: 7, 14, 21, 28, …?

A) 32
B) 35
C) 38
D) 42

Answer 116: B) 35

Explanation: This series represents an arithmetic progression where each number is obtained by adding 7 to the previous number. To find the next number, add 7 to 28, which equals 35.


Question 117: What is the missing number in the series: 4, 16, 64, ?, 256?

A) 128
B) 144
C) 180
D) 192

Answer 117: A) 128

Explanation: This series represents a pattern where each number is obtained by squaring the previous number. To find the missing number, calculate the square of 8, which is 64.


Question 118: What is the next number in the series: 5, 15, 45, 135, …?

A) 250
B) 375
C) 405
D) 500

Answer 118: B) 375

Explanation: This series represents a pattern where each number is obtained by multiplying the previous number by 3. To find the next number, multiply 135 by 3, which equals 405.


Question 119: What is the missing number in the series: 8, 12, 18, ?, 32?

A) 20
B) 22
C) 24
D) 28

Answer 119: C) 24

Explanation: This series represents an arithmetic progression where each number is obtained by adding consecutive multiples of 4 (4, 6, 6, …). To find the missing number, add 6 to 18, which equals 24.


Question 120: What is the next number in the series: 1, 2, 4, 8, …?

A) 12
B) 14
C) 16
D) 18

Answer 120: C) 16

Explanation: This series represents a pattern where each number is obtained by doubling the previous number. To find the next number, double 8, which equals 16.

 

Question 121: What is the next number in the series: 9, 18, 36, 72, …?

A) 108
B) 144
C) 162
D) 216

Answer 121: C) 162

Explanation: This series represents a pattern where each number is obtained by doubling the previous number. To find the next number, double 72, which equals 144, and then double it again, which equals 162.


Question 122: What is the missing number in the series: 7, 14, 28, ?, 112?

A) 49
B) 56
C) 72
D) 84

Answer 122: B) 56

Explanation: This is a doubling pattern where each number is obtained by doubling the previous number. To find the missing number, double 28, which equals 56.


Question 123: What is the next number in the series: 3, 9, 27, 81, …?

A) 108
B) 162
C) 243
D) 324

Answer 123: C) 243

Explanation: This series represents a pattern where each number is obtained by multiplying the previous number by 3. To find the next number, multiply 81 by 3, which equals 243.


Question 124: What is the missing number in the series: 6, 15, 30, ?, 90?

A) 45
B) 50
C) 60
D) 75

Answer 124: B) 50

Explanation: This series represents a pattern where each number is obtained by multiplying the previous number by 2 and then subtracting 3. To find the missing number, multiply 30 by 2, which equals 60, and then subtract 10 (3 multiplied by 2 minus 1), which equals 50.


Question 125: What is the next number in the series: 2, 8, 32, 128, …?

A) 256
B) 512
C) 1024
D) 2048

Answer 125: A) 256

Explanation: This series represents a pattern where each number is obtained by multiplying the previous number by 4. To find the next number, multiply 128 by 4, which equals 512.

 

Question 126: What is the next number in the series: 10, 20, 40, 80, …?

A) 160
B) 200
C) 240
D) 320

Answer 126: A) 160

Explanation: This series represents a pattern where each number is obtained by doubling the previous number. To find the next number, double 80, which equals 160.


Question 127: What is the missing number in the series: 3, 10, 21, ?, 73?

A) 36
B) 42
C) 45
D) 54

Answer 127: B) 42

Explanation: This series represents a pattern where each number is obtained by adding consecutive prime numbers (7, 11, 13, …). To find the missing number, add 13 to 21, which equals 34, and then add 8 (the next prime number), which equals 42.


Question 128: What is the next number in the series: 6, 13, 26, 53, …?

A) 106
B) 108
C) 112
D) 116

Answer 128: C) 112

Explanation: This series represents a pattern where each number is obtained by doubling the previous number and then subtracting 1. To find the next number, double 53 (106) and then add 6, which equals 112.


Question 129: What is the missing number in the series: 9, 16, 32, ?, 128?

A) 48
B) 64
C) 72
D) 96

Answer 129: B) 64

Explanation: This series represents a pattern where each number is obtained by doubling the previous number. To find the missing number, double 32, which equals 64.


Question 130: What is the next number in the series: 2, 6, 12, 20, …?

A) 30
B) 36
C) 42
D) 50

Answer 130: A) 30

Explanation: This series represents an arithmetic progression where each number is obtained by adding consecutive positive integers (4, 6, 8, …). To find the next number, add 10 to 20, which equals 30.

 

 

Question 131: What is the next number in the series: 14, 21, 28, 35, …?

A) 40
B) 42
C) 45
D) 49

Answer 131: B) 42

Explanation: This series represents an arithmetic progression where each number is obtained by adding 7 to the previous number. To find the next number, add 7 to 35, which equals 42.


Question 132: What is the missing number in the series: 5, 10, 20, 40, ?, 160?

A) 60
B) 80
C) 100
D) 120

Answer 132: B) 80

Explanation: This series represents a pattern where each number is obtained by doubling the previous number. To find the missing number, double 40, which equals 80.


Question 133: What is the next number in the series: 8, 16, 32, 64, …?

A) 96
B) 128
C) 192
D) 256

Answer 133: B) 128

Explanation: This series represents a pattern where each number is obtained by doubling the previous number. To find the next number, double 64, which equals 128.


Question 134: What is the missing number in the series: 6, 15, 36, ?, 99?

A) 48
B) 54
C) 63
D) 72

Answer 134: C) 63

Explanation: This series represents a pattern where each number is obtained by multiplying the previous number by 2 and then subtracting 3. To find the missing number, multiply 36 by 2, which equals 72, and then subtract 9 (3 multiplied by 3), which equals 63.


Question 135: What is the next number in the series: 3, 9, 27, 81, …?

A) 108
B) 162
C) 243
D) 324

Answer 135: C) 243

Explanation: This series represents a pattern where each number is obtained by multiplying the previous number by 3. To find the next number, multiply 81 by 3, which equals 243.

 

Question 136: What is the next number in the series: 12, 24, 48, 96, …?

A) 144
B) 192
C) 200
D) 240

Answer 136: B) 192

Explanation: This series represents a pattern where each number is obtained by doubling the previous number. To find the next number, double 96, which equals 192.


Question 137: What is the missing number in the series: 7, 14, 28, ?, 112?

A) 49
B) 56
C) 72
D) 84

Answer 137: B) 56

Explanation: This is a doubling pattern where each number is obtained by doubling the previous number. To find the missing number, double 28, which equals 56.


Question 138: What is the next number in the series: 6, 12, 24, 48, …?

A) 96
B) 96
C) 120
D) 144

Answer 138: A) 96

Explanation: This series represents a pattern where each number is obtained by doubling the previous number. To find the next number, double 48, which equals 96.


Question 139: What is the missing number in the series: 9, 18, 36, ?, 144?

A) 54
B) 72
C) 90
D) 108

Answer 139: C) 90

Explanation: This series represents a pattern where each number is obtained by doubling the previous number. To find the missing number, double 36, which equals 72, and then double it again, which equals 144. The missing number is 90.


Question 140: What is the next number in the series: 2, 6, 12, 20, …?

A) 30
B) 36
C) 42
D) 50

Answer 140: A) 30

Explanation: This series represents an arithmetic progression where each number is obtained by adding consecutive positive integers (4, 6, 8, …). To find the next number, add 10 to 20, which equals 30.

 

Question 141: What is the next number in the series: 14, 19, 26, 35, …?

A) 40
B) 45
C) 50
D) 55

Answer 141: B) 45

Explanation: This series represents an arithmetic progression where each number is obtained by adding consecutive positive integers (5, 7, 9, …). To find the next number, add 9 to 35, which equals 44, and then add 1, which equals 45.


Question 142: What is the missing number in the series: 3, 12, 27, ?, 75?

A) 36
B) 45
C) 54
D) 63

Answer 142: C) 54

Explanation: This series represents a pattern where each number is obtained by multiplying the previous number by 3 and then subtracting 3. To find the missing number, multiply 27 by 3, which equals 81, and then subtract 27, which equals 54.


Question 143: What is the next number in the series: 5, 25, 125, 625, …?

A) 3125
B) 6250
C) 12500
D) 25000

Answer 143: A) 3125

Explanation: This series represents a pattern where each number is obtained by multiplying the previous number by 5. To find the next number, multiply 625 by 5, which equals 3125.


Question 144: What is the missing number in the series: 8, 14, 22, ?, 38?

A) 26
B) 28
C) 30
D) 32

Answer 144: B) 28

Explanation: This series represents an arithmetic progression where each number is obtained by adding consecutive positive integers (6, 8, 10, …). To find the missing number, add 10 to 22, which equals 32, and then subtract 4 (the next positive integer), which equals 28.


Question 145: What is the next number in the series: 2, 4, 8, 16, …?

A) 24
B) 32
C) 48
D) 64

Answer 145: B) 32

Explanation: This series represents a pattern where each number is obtained by doubling the previous number. To find the next number, double 16, which equals 32.

 

Question 146: What is the next number in the series: 11, 13, 17, 19, …?

A) 21
B) 23
C) 27
D) 29

Answer 146: B) 23

Explanation: This series represents a pattern of prime numbers where each number is the next prime number in sequence. To find the next number, the next prime number after 19 is 23.


Question 147: What is the missing number in the series: 6, 12, 24, ?, 96?

A) 36
B) 42
C) 48
D) 54

Answer 147: C) 48

Explanation: This series represents a pattern where each number is obtained by doubling the previous number. To find the missing number, double 24, which equals 48.


Question 148: What is the next number in the series: 3, 9, 27, 81, …?

A) 108
B) 162
C) 243
D) 324

Answer 148: C) 243

Explanation: This series represents a pattern where each number is obtained by multiplying the previous number by 3. To find the next number, multiply 81 by 3, which equals 243.


Question 149: What is the missing number in the series: 7, 16, 37, ?, 145?

A) 64
B) 76
C) 88
D) 100

Answer 149: B) 76

Explanation: This series represents a pattern where each number is obtained by adding consecutive multiples of 9 (9, 21, 33, …). To find the missing number, add 21 to 37, which equals 58, and then add 18 (the next multiple of 9), which equals 76.


Question 150: What is the next number in the series: 2, 4, 16, 256, …?

A) 512
B) 1024
C) 2048
D) 4096

Answer 150: D) 4096

Explanation: This series represents a pattern where each number is obtained by raising the previous number to the power of 2. To find the next number, raise 256 to the power of 2, which equals 4096.

 

Question 151: What is the next number in the series: 5, 9, 17, 33, …?

A) 49
B) 65
C) 81
D) 97

Answer 151: B) 65

Explanation: This series represents a pattern where each number is obtained by doubling the previous number and then subtracting 1. To find the next number, double 33, which equals 66, and then subtract 1, which equals 65.


Question 152: What is the missing number in the series: 10, 20, 40, ?, 160?

A) 60
B) 80
C) 100
D) 120

Answer 152: B) 80

Explanation: This series represents a pattern where each number is obtained by doubling the previous number. To find the missing number, double 40, which equals 80.


Question 153: What is the next number in the series: 8, 16, 32, 64, …?

A) 96
B) 128
C) 192
D) 256

Answer 153: B) 128

Explanation: This series represents a pattern where each number is obtained by doubling the previous number. To find the next number, double 64, which equals 128.


Question 154: What is the missing number in the series: 9, 18, 36, ?, 144?

A) 54
B) 72
C) 90
D) 108

Answer 154: C) 90

Explanation: This series represents a pattern where each number is obtained by doubling the previous number. To find the missing number, double 36, which equals 72, and then double it again, which equals 144. The missing number is 90.


Question 155: What is the next number in the series: 2, 6, 18, 54, …?

A) 108
B) 162
C) 216
D) 324

Answer 155: C) 216

Explanation: This series represents a pattern where each number is obtained by multiplying the previous number by 3. To find the next number, multiply 54 by 3, which equals 162, and then multiply it again by 3, which equals 216.

 

Question 156: What is the next number in the series: 17, 34, 51, 68, …?

A) 85
B) 86
C) 87
D) 88

Answer 156: A) 85

Explanation: This series represents an arithmetic progression where each number is obtained by adding 17 to the previous number. To find the next number, add 17 to 68, which equals 85.


Question 157: What is the missing number in the series: 4, 16, 64, ?, 256?

A) 128
B) 144
C) 180
D) 192

Answer 157: A) 128

Explanation: This series represents a pattern where each number is obtained by squaring the previous number. To find the missing number, calculate the square of 8, which is 64, and then double it, which equals 128.


Question 158: What is the next number in the series: 6, 12, 24, 48, …?

A) 96
B) 96
C) 120
D) 144

Answer 158: A) 96

Explanation: This series represents a pattern where each number is obtained by doubling the previous number. To find the next number, double 48, which equals 96.


Question 159: What is the missing number in the series: 10, 20, 30, ?, 50?

A) 35
B) 40
C) 45
D) 55

Answer 159: B) 40

Explanation: This series represents an arithmetic progression where each number is obtained by adding 10 to the previous number. To find the missing number, add 10 to 30, which equals 40.


Question 160: What is the next number in the series: 3, 9, 27, 81, …?

A) 108
B) 162
C) 243
D) 324

Answer 160: C) 243

Explanation: This series represents a pattern where each number is obtained by multiplying the previous number by 3. To find the next number, multiply 81 by 3, which equals 243.

 

Question 161: What is the next number in the series: 13, 20, 29, 40, …?

A) 51
B) 52
C) 53
D) 54

Answer 161: B) 52

Explanation: This series represents an arithmetic progression where each number is obtained by adding consecutive positive integers (7, 9, 11, …). To find the next number, add 12 to 40, which equals 52.


Question 162: What is the missing number in the series: 5, 25, 125, ?, 3125?

A) 625
B) 725
C) 825
D) 925

Answer 162: A) 625

Explanation: This series represents a pattern where each number is obtained by raising the previous number to the power of 5. To find the missing number, raise 125 to the power of 5, which equals 625.


Question 163: What is the next number in the series: 9, 18, 36, 72, …?

A) 144
B) 216
C) 288
D) 324

Answer 163: A) 144

Explanation: This series represents a pattern where each number is obtained by doubling the previous number. To find the next number, double 72, which equals 144.


Question 164: What is the missing number in the series: 7, 17, 37, ?, 137?

A) 57
B) 67
C) 77
D) 87

Answer 164: C) 77

Explanation: This series represents a pattern where each number is obtained by adding consecutive multiples of 10 (10, 20, 30, …). To find the missing number, add 40 to 37, which equals 77.


Question 165: What is the next number in the series: 2, 8, 18, 32, …?

A) 50
B) 58
C) 72
D) 98

Answer 165: B) 58

Explanation: This series represents a pattern where each number is obtained by adding consecutive even numbers (6, 8, 10, …). To find the next number, add 26 to 32, which equals 58.

 

Question 166: What is the next number in the series: 11, 15, 19, 23, …?

A) 26
B) 27
C) 28
D) 29

Answer 166: C) 28

Explanation: This series represents an arithmetic progression where each number is obtained by adding 4 to the previous number. To find the next number, add 4 to 23, which equals 27, and then add 1 more, which equals 28.


Question 167: What is the missing number in the series: 6, 12, 36, ?, 324?

A) 72
B) 96
C) 108
D) 144

Answer 167: D) 144

Explanation: This series represents a pattern where each number is obtained by multiplying the previous number by 3. To find the missing number, multiply 36 by 3, which equals 108, and then multiply it again by 3, which equals 324. The missing number is 144.


Question 168: What is the next number in the series: 7, 14, 28, 56, …?

A) 112
B) 168
C) 224
D) 336

Answer 168: A) 112

Explanation: This series represents a pattern where each number is obtained by doubling the previous number. To find the next number, double 56, which equals 112.


Question 169: What is the missing number in the series: 8, 16, 24, ?, 40?

A) 28
B) 30
C) 32
D) 36

Answer 169: B) 30

Explanation: This series represents an arithmetic progression where each number is obtained by adding 8 to the previous number. To find the missing number, add 8 to 24, which equals 32, and then subtract 2 to get 30.


Question 170: What is the next number in the series: 3, 9, 27, 81, …?

A) 108
B) 162
C) 243
D) 324

Answer 170: C) 243

Explanation: This series represents a pattern where each number is obtained by multiplying the previous number by 3. To find the next number, multiply 81 by 3, which equals 243.

 

Question 171: What is the next number in the series: 12, 22, 32, 42, …?

A) 52
B) 54
C) 62
D) 72

Answer 171: A) 52

Explanation: This series represents an arithmetic progression where each number is obtained by adding 10 to the previous number. To find the next number, add 10 to 42, which equals 52.


Question 172: What is the missing number in the series: 9, 27, 81, ?, 243?

A) 121
B) 135
C) 169
D) 243

Answer 172: C) 169

Explanation: This series represents a pattern where each number is obtained by multiplying the previous number by 3 and then subtracting 18. To find the missing number, multiply 81 by 3, which equals 243, and then subtract 18 to get 169.


Question 173: What is the next number in the series: 15, 30, 60, 120, …?

A) 180
B) 240
C) 250
D) 300

Answer 173: B) 240

Explanation: This series represents a pattern where each number is obtained by doubling the previous number. To find the next number, double 120, which equals 240.


Question 174: What is the missing number in the series: 7, 14, 21, ?, 35?

A) 24
B) 27
C) 28
D) 30

Answer 174: C) 28

Explanation: This series represents an arithmetic progression where each number is obtained by adding 7 to the previous number. To find the missing number, add 7 to 21, which equals 28.


Question 175: What is the next number in the series: 2, 4, 16, 256, …?

A) 512
B) 1024
C) 2048
D) 4096

Answer 175: D) 4096

Explanation: This series represents a pattern where each number is obtained by raising the previous number to the power of 2. To find the next number, raise 256 to the power of 2, which equals 4096.

 

Question 176: What is the next number in the series: 3, 9, 18, 30, …?

A) 42
B) 48
C) 54
D) 60

Answer 176: A) 42

Explanation: This series represents an arithmetic progression where each number is obtained by adding consecutive positive integers (6, 9, 12, …). To find the next number, add 12 to 30, which equals 42.


Question 177: What is the missing number in the series: 5, 20, 80, ?, 1280?

A) 320
B) 400
C) 640
D) 800

Answer 177: B) 400

Explanation: This series represents a pattern where each number is obtained by multiplying the previous number by 4. To find the missing number, multiply 80 by 4, which equals 320, and then multiply it again by 4 to get 400.


Question 178: What is the next number in the series: 10, 20, 30, 40, …?

A) 45
B) 50
C) 55
D) 60

Answer 178: B) 50

Explanation: This series represents an arithmetic progression where each number is obtained by adding 10 to the previous number. To find the next number, add 10 to 40, which equals 50.


Question 179: What is the missing number in the series: 8, 24, 72, ?, 648?

A) 144
B) 216
C) 324
D) 432

Answer 179: B) 216

Explanation: This series represents a pattern where each number is obtained by multiplying the previous number by 3. To find the missing number, multiply 72 by 3, which equals 216.


Question 180: What is the next number in the series: 4, 12, 36, 108, …?

A) 216
B) 324
C) 432
D) 648

Answer 180: D) 648

Explanation: This series represents a pattern where each number is obtained by multiplying the previous number by 3. To find the next number, multiply 108 by 3, which equals 324, and then multiply it again by 3 to get 648.

 

Question 181: What is the next number in the series: 7, 14, 28, 56, …?

A) 112
B) 168
C) 224
D) 336

Answer 181: A) 112

Explanation: This series represents a pattern where each number is obtained by doubling the previous number. To find the next number, double 56, which equals 112.


Question 182: What is the missing number in the series: 10, 15, 25, ?, 45?

A) 30
B) 35
C) 40
D) 50

Answer 182: B) 35

Explanation: This series represents an arithmetic progression where each number is obtained by adding consecutive positive integers (5, 10, 15, …). To find the missing number, add 10 to 25, which equals 35.


Question 183: What is the next number in the series: 2, 6, 24, 120, …?

A) 360
B) 720
C) 1440
D) 2880

Answer 183: B) 720

Explanation: This series represents a pattern where each number is obtained by multiplying the previous number by an increasing positive integer (3, 4, 5, …). To find the next number, multiply 120 by 6, which equals 720.


Question 184: What is the missing number in the series: 8, 16, 32, ?, 128?

A) 48
B) 64
C) 72
D) 96

Answer 184: B) 64

Explanation: This series represents a pattern where each number is obtained by doubling the previous number. To find the missing number, double 32, which equals 64.


Question 185: What is the next number in the series: 3, 12, 48, 192, …?

A) 384
B) 768
C) 1536
D) 3072

Answer 185: A) 384

Explanation: This series represents a pattern where each number is obtained by multiplying the previous number by 4. To find the next number, multiply 192 by 4, which equals 768, and then divide it by 2 to get 384.

 

Question 186: What is the next number in the series: 9, 18, 27, 36, …?

A) 44
B) 45
C) 48
D) 54

Answer 186: B) 45

Explanation: This series represents an arithmetic progression where each number is obtained by adding 9 to the previous number. To find the next number, add 9 to 36, which equals 45.


Question 187: What is the missing number in the series: 6, 12, 36, 108, ?, 972?

A) 216
B) 324
C) 432
D) 648

Answer 187: A) 216

Explanation: This series represents a pattern where each number is obtained by multiplying the previous number by 3. To find the missing number, multiply 108 by 3, which equals 324, and then multiply it again by 3 to get 972. The missing number is 216.


Question 188: What is the next number in the series: 11, 21, 42, 84, …?

A) 126
B) 168
C) 168
D) 192

Answer 188: B) 168

Explanation: This series represents a pattern where each number is obtained by doubling the previous number and then adding 1. To find the next number, double 84, which equals 168, and then add 1.


Question 189: What is the missing number in the series: 4, 8, 16, 32, ?, 128?

A) 48
B) 64
C) 72
D) 96

Answer 189: B) 64

Explanation: This series represents a pattern where each number is obtained by doubling the previous number. To find the missing number, double 32, which equals 64.


Question 190: What is the next number in the series: 3, 6, 9, 27, …?

A) 54
B) 81
C) 108
D) 162

Answer 190: B) 81

Explanation: This series represents a pattern where each number is obtained by multiplying the previous number by 3. To find the next number, multiply 27 by 3, which equals 81.

Missing Number Series Tricks

Missing Number Series Tricks are techniques used to identify and complete patterns in number series, particularly when one or more numbers are missing in a sequence. These tricks involve recognizing the underlying logic or rule governing the series and using that knowledge to deduce the missing values. Here are some hints to help you effectively apply missing number series tricks:

  1. Identify the Pattern: Carefully examine the given series to identify any recurring patterns or trends. Look for arithmetic progressions (constant differences) or geometric progressions (constant ratios) between the numbers.
  2. Start with Simple Arithmetic Series: If the series appears to have a straightforward arithmetic progression, find the common difference between consecutive terms. This difference is often applied consistently to find missing values.
  3. Try Geometric Series: In geometric series, each term is obtained by multiplying the previous term by a constant factor. Look for such factors and apply them to find missing values.
  4. Look for Alternate Patterns: Sometimes, series may involve a combination of arithmetic and geometric progressions or other mathematical operations. Be open to recognizing different patterns within the same series.
  5. Test Multiple Rules: If the series does not immediately fit a common arithmetic or geometric progression, experiment with different rules or operations to see if they apply. Be systematic in your approach.
  6. Use Backward Calculation: In some cases, it may be easier to work backward from the known values to deduce the missing ones. Start from the end of the series and work your way back.
  7. Check for Symmetry: Symmetric series often have a pattern where the terms on one side mirror the terms on the other side. Identify this symmetry and apply it to determine the missing values.
  8. Explore Number Relationships: Consider how the numbers in the series relate to each other. Are there any squares, cubes, or other number relationships involved?
  9. Stay Consistent: Once you identify a pattern or rule, ensure it is consistently applied throughout the series. If your calculated missing values align with the rest of the series, you’re likely on the right track.
  10. Practice Regularly: The more you practice solving missing number series, the better you’ll become at recognizing patterns quickly. Regular practice will sharpen your skills and increase your speed in solving these problems.

 

Question 191: What is the next number in the series: 14, 28, 56, 112, …?

A) 168
B) 224
C) 256
D) 336

Answer 191: A) 168

Explanation: This series represents a pattern where each number is obtained by doubling the previous number. To find the next number, double 112, which equals 224, and then double it again to get 168.


Question 192: What is the missing number in the series: 9, 27, 63, ?, 315?

A) 126
B) 189
C) 252
D) 252

Answer 192: B) 189

Explanation: This series represents a pattern where each number is obtained by multiplying the previous number by 3 and then subtracting 9. To find the missing number, multiply 63 by 3, which equals 189.


Question 193: What is the next number in the series: 12, 18, 27, 45, …?

A) 54
B) 63
C) 72
D) 90

Answer 193: B) 63

Explanation: This series represents a pattern where each number is obtained by adding consecutive positive integers (6, 9, 18, …). To find the next number, add 18 to 45, which equals 63.


Question 194: What is the missing number in the series: 7, 14, 28, ?, 112?

A) 42
B) 56
C) 84
D) 98

Answer 194: C) 84

Explanation: This series represents a pattern where each number is obtained by doubling the previous number. To find the missing number, double 28, which equals 56, and then double it again to get 112. The missing number is 84.


Question 195: What is the next number in the series: 3, 6, 18, 72, …?

A) 216
B) 324
C) 432
D) 576

Answer 195: B) 324

Explanation: This series represents a pattern where each number is obtained by multiplying the previous number by 3. To find the next number, multiply 72 by 3, which equals 216, and then multiply it again by 3 to get 324.

 

Question 196: What is the next number in the series: 8, 16, 32, 64, …?

A) 96
B) 128
C) 192
D) 256

Answer 196: B) 128

Explanation: This series represents a pattern where each number is obtained by doubling the previous number. To find the next number, double 64, which equals 128.


Question 197: What is the missing number in the series: 10, 20, 40, ?, 160?

A) 60
B) 80
C) 100
D) 120

Answer 197: B) 80

Explanation: This series represents a pattern where each number is obtained by doubling the previous number. To find the missing number, double 40, which equals 80.


Question 198: What is the next number in the series: 6, 12, 24, 48, …?

A) 96
B) 96
C) 120
D) 144

Answer 198: A) 96

Explanation: This series represents a pattern where each number is obtained by doubling the previous number. To find the next number, double 48, which equals 96.


Question 199: What is the missing number in the series: 10, 20, 30, ?, 50?

A) 35
B) 40
C) 45
D) 55

Answer 199: B) 40

Explanation: This series represents an arithmetic progression where each number is obtained by adding 10 to the previous number. To find the missing number, add 10 to 30, which equals 40.


Question 200: What is the next number in the series: 3, 9, 27, 81, …?

A) 108
B) 162
C) 243
D) 324

Answer 200: C) 243

Explanation: This series represents a pattern where each number is obtained by multiplying the previous number by 3. To find the next number, multiply 81 by 3, which equals 243.

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