What will come in place of the question mark (?) in the following number series? 6, 15, 28, 45, ? MCQ with Answer and Explanation

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What will come in place of the question mark (?) in the following number series? 6, 15, 28, 45, ?

A. 62

B. 66

C. 64

D. 60

Answer: Option B

Solution (By JKSSB Mock Tests)

The differences are: 9, 13, 17. These are increasing by 4. The next difference is 21. Therefore, 45+21=66.

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? 5, 11, 21, 35, ?

A. 49

B. 53

C. 51

D. 47

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Correct Answer: Option B

Explanation:
The differences are: 6, 10, 14. These are increasing by 4. The next difference is 18. Therefore, 35+18=53.

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? 41, 43, 47, 53, 59, ?

A. 64

B. 65

C. 61

D. 67

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Correct Answer: Option C

Explanation:
The series consists of consecutive prime numbers. The prime number immediately following 59 is 61.[reference:4]

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, 7, 12, 19, 28, ?

A. 37

B. 41

C. 39

D. 35

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Correct Answer: Option C

Explanation:
The differences are: 3, 5, 7, 9. These are consecutive odd numbers. The next difference is 11. Therefore, 28+11=39.

This question belongs to: Reasoning Number Series

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