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. 36

B. 30

C. 42

D. 49

Answer: Option A

Solution (By JKSSB Mock Tests)

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? 5, 11, 21, 35, ?

A. 49

B. 51

C. 47

D. 53

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Correct Answer: Option D

Explanation:
The differences are: 6, 10, 14. These are increasing by 4. The next difference is 18. Therefore, 35+18=53.

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? 1, 1, 2, 3, 5, 8, 13, ?

A. 21

B. 24

C. 20

D. 18

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Correct Answer: Option A

Explanation:
This is a Fibonacci series where each term is the sum of the previous two terms. 13+8=21.[reference:9]

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, 14, 30, 50, 74, ?

A. 94

B. 96

C. 98

D. 102

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Correct Answer: Option D

Explanation:
The differences are: 12, 16, 20, 24. These are increasing by 4. The next difference is 28. Therefore, 74+28=102.

This question belongs to: Reasoning Number Series

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