What will come in place of the question mark (?) in the following number series? 2, 9, 28, 65, ? MCQ with Answer and Explanation

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What will come in place of the question mark (?) in the following number series? 2, 9, 28, 65, ?

A. 126

B. 125

C. 124

D. 127

Answer: Option A

Solution (By JKSSB Mock Tests)

The pattern is: 1³+1=2, 2³+1=9, 3³+1=28, 4³+1=65. The next term is 5³+1=126.[reference:8]

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? 1, 4, 9, 16, 25, ?

A. 49

B. 36

C. 30

D. 35

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Correct Answer: Option B

Explanation:
The series consists of squares of consecutive integers: 1², 2², 3², 4², 5². The next term is 6²=36.

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? 5, 10, 20, 40, ?

A. 70

B. 90

C. 80

D. 60

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Correct Answer: Option C

Explanation:
Each term is multiplied by 2. Therefore, 40×2=80.

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? 9, 18, 36, 72, ?

A. 216

B. 108

C. 180

D. 144

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Correct Answer: Option D

Explanation:
Each term is multiplied by 2. Therefore, 72×2=144.

This question belongs to: Reasoning Number Series

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