What will come in place of the question mark (?) in the following number series? 6, 9, 13, 18, ? MCQ with Answer and Explanation

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What will come in place of the question mark (?) in the following number series? 6, 9, 13, 18, ?

A. 24

B. 23

C. 25

D. 22

Answer: Option A

Solution (By JKSSB Mock Tests)

The differences are: 3, 4, 5. The next difference is 6. Therefore, 18+6=24.

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, 11, 18, 27, 38, ?

A. 49

B. 51

C. 53

D. 47

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Correct Answer: Option B

Explanation:
The differences are: 5, 7, 9, 11. These are consecutive odd numbers. The next difference is 13. Therefore, 38+13=51.

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, 6, 12, 14, 28, 30, ?

A. 60

B. 64

C. 62

D. 32

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Correct Answer: Option A

Explanation:
The pattern alternates: +2, ×2, +2, ×2, +2, ×2. The last operation is ×2. Therefore, 30×2=60.[reference:14]

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? 3, 12, 27, 48, ?

A. 60

B. 63

C. 72

D. 75

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Correct Answer: Option D

Explanation:
The pattern is: 3×1²=3, 3×2²=12, 3×3²=27, 3×4²=48. The next term is 3×5²=75.

This question belongs to: Reasoning Number Series

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