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

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

A. 42

B. 40

C. 48

D. 45

Answer: Option D

Solution (By JKExamLibrary)

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

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Question #1

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What will come in place of the question mark (?) in the following number series? 24, 30, 36, 42, ?

A. 60

B. 54

C. 48

D. 50

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Correct Answer: Option C

Explanation:
The series increases by 6 each time. Therefore, 42+6=48.

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. 81

B. 54

C. 108

D. 72

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Correct Answer: Option A

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? 8, 18, 32, 50, ?

A. 74

B. 72

C. 68

D. 70

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Correct Answer: Option B

Explanation:
The pattern is: 2×2²=8, 2×3²=18, 2×4²=32, 2×5²=50. The next term is 2×6²=72.

This question belongs to: Reasoning Number Series

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