What will come in place of the question mark (?) in the following number series? 1, 2, 6, 24, ? 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, ?

A. 60

B. 100

C. 80

D. 120

Answer: Option D

Solution (By JKExamLibrary)

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

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, 5, 14, 30, 55, ?

A. 91

B. 90

C. 85

D. 80

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Correct Answer: Option A

Explanation:
The differences are: 4, 9, 16, 25. These are squares of consecutive integers: 2², 3², 4², 5². The next difference is 6²=36. Therefore, 55+36=91.

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? 4, 16, 36, 64, ?

A. 81

B. 144

C. 100

D. 121

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Correct Answer: Option C

Explanation:
The series consists of squares of even numbers: 2², 4², 6², 8². The next term is 10²=100.

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. 74

B. 72

C. 78

D. 76

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Correct Answer: Option D

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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