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. 124

B. 127

C. 125

D. 126

Answer: Option D

Solution (By JKExamLibrary)

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? 7, 12, 19, 28, ?

A. 39

B. 41

C. 37

D. 35

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Correct Answer: Option A

Explanation:
The differences are: 5, 7, 9. These are consecutive odd numbers. The next difference is 11. Therefore, 28+11=39.

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. 18

C. 24

D. 20

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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? 4, 6, 12, 14, 28, 30, ?

A. 62

B. 64

C. 32

D. 60

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Correct Answer: Option D

Explanation:
The pattern alternates: +2, ×2, +2, ×2, +2, ×2. The last operation is ×2. Therefore, 30×2=60.[reference:14]

This question belongs to: Reasoning Number Series

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