What will come in place of the question mark (?) in the following number series? 7, 13, 25, 49, ? MCQ with Answer and Explanation

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What will come in place of the question mark (?) in the following number series? 7, 13, 25, 49, ?

A. 99

B. 103

C. 101

D. 97

Answer: Option D

Solution (By JKSSB Mock Tests)

Each term is obtained by multiplying by 2 and subtracting 1. (7×2)-1=13, (13×2)-1=25, (25×2)-1=49. The next term is (49×2)-1=97.

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. 65

C. 70

D. 55

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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? 2, 9, 28, 65, ?

A. 124

B. 125

C. 127

D. 126

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Correct Answer: Option D

Explanation:
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

Question #3

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What will come in place of the question mark (?) in the following number series? 9, 14, 20, 27, ?

A. 33

B. 39

C. 37

D. 35

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Correct Answer: Option D

Explanation:
The differences are: 5, 6, 7. The next difference is 8. Therefore, 27+8=35.

This question belongs to: Reasoning Number Series

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