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 JKSSB Mock Tests)

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? 2, 10, 30, 68, 130, ?

A. 210

B. 220

C. 200

D. 222

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Correct Answer: Option D

Explanation:
The pattern is: 1³+1=2, 2³+2=10, 3³+3=30, 4³+4=68, 5³+5=130. The next term is 6³+6=222.

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? 12, 20, 30, 42, ?

A. 58

B. 56

C. 52

D. 54

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Correct Answer: Option B

Explanation:
The differences are: 8, 10, 12. These are increasing by 2. The next difference is 14. Therefore, 42+14=56.

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, 22, 33, 46, ?

A. 57

B. 63

C. 59

D. 61

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Correct Answer: Option D

Explanation:
The differences are: 7, 9, 11, 13. These are consecutive odd numbers. The next difference is 15. Therefore, 46+15=61.

This question belongs to: Reasoning Number Series

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