What will come in place of the question mark (?) in the following number series? 3, 8, 15, 24, ? MCQ with Answer and Explanation

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What will come in place of the question mark (?) in the following number series? 3, 8, 15, 24, ?

A. 33

B. 35

C. 40

D. 36

Answer: Option B

Solution (By JKSSB Mock Tests)

The differences are: 5, 7, 9. The next difference is 11. Therefore, 24+11=35.

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? 4, 6, 9, 13, ?

A. 17

B. 18

C. 16

D. 19

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Correct Answer: Option B

Explanation:
The differences are: 2, 3, 4. The next difference is 5. Therefore, 13+5=18.

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, 15, 31, 63, ?

A. 123

B. 121

C. 127

D. 125

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Correct Answer: Option C

Explanation:
Each term is obtained by multiplying by 2 and adding 1. (7×2)+1=15, (15×2)+1=31, (31×2)+1=63. The next term is (63×2)+1=127.

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? 5, 15, 29, 47, 69, ?

A. 95

B. 87

C. 91

D. 89

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Correct Answer: Option A

Explanation:
The differences are: 10, 14, 18, 22. These are increasing by 4. The next difference is 26. Therefore, 69+26=95.

This question belongs to: Reasoning Number Series

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