What will come in place of the question mark (?) in the following number series? 7, 10, 15, 22, ? MCQ with Answer and Explanation

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What will come in place of the question mark (?) in the following number series? 7, 10, 15, 22, ?

A. 31

B. 33

C. 29

D. 35

Answer: Option A

Solution (By JKSSB Mock Tests)

The differences are: 3, 5, 7. These are consecutive odd numbers. The next difference is 9. Therefore, 22+9=31.

This question belongs to: Reasoning Number Series

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Question #1

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What will come in place of the question mark (?) in the following number series? 1, 8, 27, 64, 125, ?

A. 196

B. 216

C. 144

D. 169

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Correct Answer: Option B

Explanation:
The series consists of cubes of consecutive integers: 1³, 2³, 3³, 4³, 5³. The next term is 6³=216.

This question belongs to: Reasoning Number Series

Question #2

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What will come in place of the question mark (?) in the following number series? 7, 13, 25, 49, ?

A. 101

B. 103

C. 97

D. 99

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Correct Answer: Option C

Explanation:
Each term is obtained by multiplying by 2 and subtracting 1. (7×2)-1=13, (13×2)-1=25, (25×2)-1=49. The next term is (49×2)-1=97.

This question belongs to: Reasoning Number Series

Question #3

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What will come in place of the question mark (?) in the following number series? 2, 6, 14, 30, ?

A. 46

B. 62

C. 56

D. 58

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Correct Answer: Option B

Explanation:
Each term is obtained by multiplying by 2 and adding 2. (2×2)+2=6, (6×2)+2=14, (14×2)+2=30. The next term is (30×2)+2=62.

This question belongs to: Reasoning Number Series

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