What will come in place of the question mark (?) in the following number series? 8, 13, 20, 29, 40, ? MCQ with Answer and Explanation

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What will come in place of the question mark (?) in the following number series? 8, 13, 20, 29, 40, ?

A. 55

B. 49

C. 53

D. 51

Answer: Option C

Solution (By JKSSB Mock Tests)

The differences are: 5, 7, 9, 11. These are consecutive odd numbers. The next difference is 13. Therefore, 40+13=53.

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? 1, 3, 9, 27, 81, ?

A. 405

B. 324

C. 162

D. 243

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Correct Answer: Option D

Explanation:
Each term is multiplied by 3. Therefore, 81×3=243.

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? 5, 10, 17, 26, 37, ?

A. 52

B. 46

C. 50

D. 48

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Correct Answer: Option C

Explanation:
The differences are: 5, 7, 9, 11. These are consecutive odd numbers. The next difference is 13. Therefore, 37+13=50.

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? 3, 10, 21, 36, ?

A. 53

B. 55

C. 51

D. 57

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Correct Answer: Option B

Explanation:
The differences are: 7, 11, 15. These are increasing by 4. The next difference is 19. Therefore, 36+19=55.

This question belongs to: Reasoning Number Series

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