What will come in place of the question mark (?) in the following number series? 1, 5, 13, 29, ? MCQ with Answer and Explanation

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What will come in place of the question mark (?) in the following number series? 1, 5, 13, 29, ?

A. 61

B. 57

C. 63

D. 59

Answer: Option A

Solution (By JKSSB Mock Tests)

Each term is obtained by multiplying by 2 and adding 3. (1×2)+3=5, (5×2)+3=13, (13×2)+3=29. The next term is (29×2)+3=61.

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, 6, 15, 28, ?

A. 40

B. 42

C. 45

D. 48

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Correct Answer: Option C

Explanation:
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

Question #2

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What will come in place of the question mark (?) in the following number series? 1, 3, 9, 27, 81, ?

A. 162

B. 405

C. 324

D. 243

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Correct Answer: Option D

Explanation:
Each term is multiplied by 3. Therefore, 81×3=243.

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? 2, 4, 8, 14, 22, 32, ?

A. 42

B. 46

C. 40

D. 44

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Correct Answer: Option D

Explanation:
The differences are: 2, 4, 6, 8, 10. These are increasing by 2. The next difference is 12. Therefore, 32+12=44.

This question belongs to: Reasoning Number Series

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