What will come in place of the question mark (?) in the following number series? 1, 4, 9, 16, ? MCQ with Answer and Explanation

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What will come in place of the question mark (?) in the following number series? 1, 4, 9, 16, ?

A. 36

B. 20

C. 25

D. 30

Answer: Option C

Solution (By JKSSB Mock Tests)

The series consists of squares of consecutive integers: 1², 2², 3², 4². The next term is 5²=25.

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? 10, 20, 30, 40, 50, ?

A. 60

B. 70

C. 55

D. 65

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Correct Answer: Option A

Explanation:
The series increases by 10 each time. Therefore, 50+10=60.

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, 14, 28, 56, 112, ?

A. 168

B. 252

C. 196

D. 224

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Correct Answer: Option D

Explanation:
Each term is multiplied by 2. Therefore, 112×2=224.

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? 4, 9, 16, 25, ?

A. 49

B. 36

C. 42

D. 30

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Correct Answer: Option B

Explanation:
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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