What will come in place of the question mark (?) in the following number series? 2, 12, 30, 56, ? MCQ with Answer and Explanation

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What will come in place of the question mark (?) in the following number series? 2, 12, 30, 56, ?

A. 100

B. 110

C. 80

D. 90

Answer: Option D

Solution (By JKSSB Mock Tests)

The pattern is: 1×2=2, 3×4=12, 5×6=30, 7×8=56. The next term is 9×10=90.

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? 12, 20, 30, 42, ?

A. 58

B. 54

C. 56

D. 52

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Correct Answer: Option C

Explanation:
The differences are: 8, 10, 12. These are increasing by 2. The next difference is 14. Therefore, 42+14=56.

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, 3, 9, 27, ?

A. 54

B. 72

C. 81

D. 108

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Correct Answer: Option C

Explanation:
Each term is multiplied by 3. Therefore, 27×3=81.

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? 1, 2, 4, 7, 11, ?

A. 16

B. 18

C. 15

D. 14

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Correct Answer: Option A

Explanation:
The differences are: 1, 2, 3, 4. The next difference is 5. Therefore, 11+5=16.

This question belongs to: Reasoning Number Series

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