What will come in place of the question mark (?) in the following number series? 5, 13, 25, 41, 61, ? MCQ with Answer and Explanation

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What will come in place of the question mark (?) in the following number series? 5, 13, 25, 41, 61, ?

A. 81

B. 87

C. 83

D. 85

Answer: Option D

Solution (By JKSSB Mock Tests)

The differences are: 8, 12, 16, 20. These are increasing by 4. The next difference is 24. Therefore, 61+24=85.

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, 8, 14, 22, ?

A. 28

B. 34

C. 32

D. 30

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Correct Answer: Option C

Explanation:
The differences are: 4, 6, 8. These are increasing by 2. The next difference is 10. Therefore, 22+10=32.

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? 7, 12, 19, 28, ?

A. 35

B. 37

C. 41

D. 39

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Correct Answer: Option D

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

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? 1, 10, 100, ?

A. 10000

B. 500

C. 2000

D. 1000

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Correct Answer: Option D

Explanation:
Each term is multiplied by 10. Therefore, 100×10=1000.

This question belongs to: Reasoning Number Series

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