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. 107

C. 103

D. 101

Answer: Option B

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

A. 480

B. 720

C. 840

D. 600

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Correct Answer: Option B

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 #2

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What will come in place of the question mark (?) in the following number series? 1, 6, 15, 28, ?

A. 45

B. 42

C. 40

D. 48

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Correct Answer: Option A

Explanation:
The pattern is: 1×1=1, 2×3=6, 3×5=15, 4×7=28. The next term is 5×9=45.

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? 5, 13, 25, 41, 61, ?

A. 83

B. 85

C. 81

D. 87

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Correct Answer: Option B

Explanation:
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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