What will come in place of the question mark (?) in the following number series? 5, 12, 21, 32, ? MCQ with Answer and Explanation

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What will come in place of the question mark (?) in the following number series? 5, 12, 21, 32, ?

A. 45

B. 47

C. 41

D. 43

Answer: Option A

Solution (By JKExamLibrary)

The differences are: 7, 9, 11. These are increasing by 2. The next difference is 13. Therefore, 32+13=45.

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? 3, 7, 15, 31, ?

A. 65

B. 63

C. 67

D. 61

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Correct Answer: Option B

Explanation:
Each term is obtained by multiplying by 2 and adding 1. (3×2)+1=7, (7×2)+1=15, (15×2)+1=31. The next term is (31×2)+1=63.

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? 6, 13, 22, 33, 46, ?

A. 61

B. 63

C. 59

D. 57

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Correct Answer: Option A

Explanation:
The differences are: 7, 9, 11, 13. These are consecutive odd numbers. The next difference is 15. Therefore, 46+15=61.

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? 6, 13, 22, 33, ?

A. 46

B. 43

C. 42

D. 44

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Correct Answer: Option A

Explanation:
The differences are: 7, 9, 11. These are increasing by 2. The next difference is 13. Therefore, 33+13=46.

This question belongs to: Reasoning Number Series

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