What will come in place of the question mark (?) in the following number series? 4, 9, 16, 25, ? MCQ with Answer and Explanation

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What will come in place of the question mark (?) in the following number series? 4, 9, 16, 25, ?

A. 30

B. 36

C. 42

D. 49

Answer: Option B

Solution (By JKExamLibrary)

The series consists of squares of consecutive integers: 2²=4, 3²=9, 4²=16, 5²=25. The next number should be the square of 6, which is 36.[reference:2]

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, 14, 28, 46, 68, ?

A. 92

B. 90

C. 94

D. 88

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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, 68+26=94.

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? 4, 7, 13, 25, ?

A. 55

B. 51

C. 49

D. 53

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Correct Answer: Option C

Explanation:
Each term is obtained by multiplying by 2 and subtracting 1. (4×2)-1=7, (7×2)-1=13, (13×2)-1=25. The next term is (25×2)-1=49.

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? 7, 14, 23, 34, ?

A. 47

B. 45

C. 43

D. 49

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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, 34+13=47.

This question belongs to: Reasoning Number Series

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