What will come in place of the question mark (?) in the following number series? 3, 8, 15, 24, ? MCQ with Answer and Explanation

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What will come in place of the question mark (?) in the following number series? 3, 8, 15, 24, ?

A. 35

B. 36

C. 40

D. 33

Answer: Option A

Solution (By JKSSB Mock Tests)

The differences are: 5, 7, 9. The next difference is 11. Therefore, 24+11=35.

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? 10, 30, 60, 100, ?

A. 120

B. 150

C. 140

D. 160

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Correct Answer: Option B

Explanation:
The differences are: 20, 30, 40. These are increasing by 10. The next difference is 50. Therefore, 100+50=150.

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, 8, 10, 13, 17, ?

A. 23

B. 20

C. 22

D. 21

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Correct Answer: Option C

Explanation:
The differences are: 1, 2, 3, 4. The next difference is 5. Therefore, 17+5=22.

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? 2, 10, 30, 68, ?

A. 120

B. 140

C. 150

D. 130

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Correct Answer: Option D

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

This question belongs to: Reasoning Number Series

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