What will come in place of the question mark (?) in the following number series? 10, 17, 26, 37, 50, ? MCQ with Answer and Explanation

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What will come in place of the question mark (?) in the following number series? 10, 17, 26, 37, 50, ?

A. 63

B. 65

C. 61

D. 67

Answer: Option B

Solution (By JKSSB Mock Tests)

The differences are: 7, 9, 11, 13. These are consecutive odd numbers. The next difference is 15. Therefore, 50+15=65.

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, 16, 36, 64, ?

A. 121

B. 144

C. 81

D. 100

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Correct Answer: Option D

Explanation:
The series consists of squares of even numbers: 2², 4², 6², 8². The next term is 10²=100.

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, 4, 8, 16, ?

A. 24

B. 30

C. 32

D. 64

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Correct Answer: Option C

Explanation:
Each term is multiplied by 2 to get the next term. Therefore, the next term is 16×2=32.

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? 6, 13, 27, 55, ?

A. 109

B. 112

C. 110

D. 111

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Correct Answer: Option D

Explanation:
Each term is obtained by multiplying by 2 and adding 1. (6×2)+1=13, (13×2)+1=27, (27×2)+1=55. The next term is (55×2)+1=111.

This question belongs to: Reasoning Number Series

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