What will come in place of the question mark (?) in the following number series? 1, 2, 6, 24, 120, ? MCQ with Answer and Explanation

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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. 720

D. 480

Answer: Option C

Solution (By JKExamLibrary)

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

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Question #1

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What will come in place of the question mark (?) in the following number series? 6, 14, 30, 62, ?

A. 122

B. 124

C. 128

D. 126

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Correct Answer: Option D

Explanation:
Each term is obtained by multiplying by 2 and adding 2. (6×2)+2=14, (14×2)+2=30, (30×2)+2=62. The next term is (62×2)+2=126.

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? 3, 10, 20, 33, 49, 68, ?

A. 85

B. 90

C. 75

D. 91

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Correct Answer: Option B

Explanation:
The differences are: 7, 10, 13, 16, 19 (increasing by 3). The next difference is 22. Therefore, 68+22=90.[reference:17]

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? 4, 13, 28, 49, ?

A. 78

B. 76

C. 74

D. 72

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Correct Answer: Option B

Explanation:
The differences are: 9, 15, 21. These are increasing by 6. The next difference is 27. Therefore, 49+27=76.

This question belongs to: Reasoning Number Series

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