What will come in place of the question mark (?) in the following number series? 9, 16, 25, 36, ? MCQ with Answer and Explanation

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What will come in place of the question mark (?) in the following number series? 9, 16, 25, 36, ?

A. 49

B. 64

C. 81

D. 42

Answer: Option A

Solution (By JKSSB Mock Tests)

The series consists of squares of consecutive integers starting from 3: 3², 4², 5², 6². The next term is 7²=49.

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, 10, 20, 34, ?

A. 50

B. 52

C. 54

D. 48

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Correct Answer: Option B

Explanation:
The differences are: 6, 10, 14. These are increasing by 4. The next difference is 18. Therefore, 34+18=52.

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? 3, 4, 7, 11, 18, ?

A. 27

B. 29

C. 33

D. 31

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Correct Answer: Option B

Explanation:
This is a Fibonacci-like series where each term is the sum of the previous two terms. 7+11=18, 11+18=29. The next term is 29.

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? 3, 11, 27, 59, ?

A. 123

B. 127

C. 125

D. 121

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Correct Answer: Option A

Explanation:
Each term is obtained by multiplying by 2 and adding 5. (3×2)+5=11, (11×2)+5=27, (27×2)+5=59. The next term is (59×2)+5=123.

This question belongs to: Reasoning Number Series

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