What will come in place of the question mark (?) in the following number series? 2, 3, 5, 7, ? MCQ with Answer and Explanation

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What will come in place of the question mark (?) in the following number series? 2, 3, 5, 7, ?

A. 8

B. 11

C. 9

D. 10

Answer: Option B

Solution (By JKExamLibrary)

The given series consists of consecutive prime numbers. The prime numbers in order are 2, 3, 5, 7, 11, 13... Therefore, the next prime number after 7 is 11.[reference:0]

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, 14, 28, 46, 68, ?

A. 90

B. 88

C. 92

D. 94

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Correct Answer: Option C

Explanation:
The differences are: 10, 14, 18, 22. These are increasing by 4. The next difference is 26. Therefore, 68+26=94.

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? 10, 17, 26, 37, 50, ?

A. 61

B. 65

C. 67

D. 63

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Correct Answer: Option B

Explanation:
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

Question #3

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What will come in place of the question mark (?) in the following number series? 5, 11, 23, 47, ?

A. 93

B. 97

C. 99

D. 95

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Correct Answer: Option D

Explanation:
Each term is obtained by multiplying by 2 and adding 1. (5×2)+1=11, (11×2)+1=23, (23×2)+1=47. The next term is (47×2)+1=95.

This question belongs to: Reasoning Number Series

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