What will come in place of the question mark (?) in the following number series? 7, 19, 35, 55, 79, ? MCQ with Answer and Explanation

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What will come in place of the question mark (?) in the following number series? 7, 19, 35, 55, 79, ?

A. 99

B. 101

C. 107

D. 103

Answer: Option C

Solution (By JKSSB Mock Tests)

The differences are: 12, 16, 20, 24. These are increasing by 4. The next difference is 28. Therefore, 79+28=107.

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? 20, 18, 15, 11, ?

A. 6

B. 5

C. 7

D. 8

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Correct Answer: Option A

Explanation:
The differences are: -2, -3, -4. The next difference is -5. Therefore, 11-5=6.

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? 1, 2, 6, 24, 120, ?

A. 840

B. 600

C. 480

D. 720

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Correct Answer: Option D

Explanation:
The pattern is: 1×1=1, 1×2=2, 2×3=6, 6×4=24, 24×5=120. The next term is 120×6=720.

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? 8, 10, 14, 20, ?

A. 32

B. 26

C. 30

D. 28

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Correct Answer: Option D

Explanation:
The differences are: 2, 4, 6. These are increasing by 2. The next difference is 8. Therefore, 20+8=28.

This question belongs to: Reasoning Number Series

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