Series Test - Solved Examples


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Q 1 − 2, 7, 12, 17, 22, _

Options :

A - 27

B - 28

C - 10

D - 15

Answer - A

Explanation

In this series, 2 + 5 = 7, 7 + 5 = 12 and so on. Similarly each number is added with the digit 5 so the final answer will be 27.


Q 2 − 5, 2, -1, -4, -7, _

Options :

A - 10

B - -10

C - 01

D - 11

Answer - B

Explanation

In this series, 5 - 3 = 2, 2 - 3 = -1. So each number is subtracted with the digit 3 hence the final answer is -10.


Q 3 − 7, 14, 21, 28, 35, _

Options :

A - 45

B - 44

C - 43

D -42

Answer - D

Explanation

In this series, 14 + 7 = 21, 28 + 7 = 35 we can see that each number is added with the digit 7 so the final number will be 35 + 7 = 42.


Q 4 − 5, 7, 10, 12, 15, 17, 20, _

Options :

A - 20

B - 21

C - 22

D - 23

Answer - C

Explanation

In this series, 3 + 2 = 5, 5 + 3 = 8, 8 + 2 = 10, 10 + 3 = 13. Here each number is added with 2 & 3 so 20 will be added with 2 and the result will be 22.


Q 5 − 2, 3, 5, 8, 12, 17, _

Options :

A - 23

B - 24

C - 22

D - 21

Answer - A

Explanation

In this series, 2 + 1 = 3, 3 + 2 = 5, 5 + 3 = 8, 8 + 4 = 12 and so on. Hence 23 is the answer.


Q 6 − 27, 37, 49, 63, 79, _

Options :

A - 97

B - 96

C - 95

D - 94

Answer - A

Explanation

The addition sequence is 10, 12, 14, 16. So 79 + 18 = 97 is the answer.


Q 7 − 98, 110, 122, 134, 146, _

Options :

A - 158

B - 168

C - 178

D - 177

Answer - A

Explanation

Each number is added with 12 so 146 + 12 = 158.


Q 8 − 2, 4, 8, 16, 32, _

Options :

A - 64

B - 99

C - 68

D - 89

Answer - A

Explanation

The addition sequence is +2, +4, +8, +16, +32. So 32 + 32 = 64.


Q 9 − 5, 10, 20, 35, 55, _

Options :

A - 80

B - 90

C - 95

D - 100

Answer - A

Explanation

The addition of numbers is in the following sequence +5, +10, +15, +20. Finally 55 + 25 = 80.


Q 10 − 12, 15, 21, 30, 42, _

Options :

A - 56

B - 57

C - 76

D - 78

Answer - B

Explanation

The number addition sequence is +3, +6, +9…. So 42 + 15 = 57.



reasoning_series.htm
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