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. 63

B. 59

C. 61

D. 57

Answer: Option C

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? 7, 12, 19, 28, ?

A. 41

B. 39

C. 35

D. 37

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Correct Answer: Option B

Explanation:
The differences are: 5, 7, 9. These are consecutive odd numbers. The next difference is 11. Therefore, 28+11=39.

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. 121

B. 144

C. 100

D. 81

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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? 7, 13, 21, 31, ?

A. 44

B. 43

C. 41

D. 42

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Correct Answer: Option B

Explanation:
The differences are: 6, 8, 10. These are increasing by 2. The next difference is 12. Therefore, 31+12=43.

This question belongs to: Reasoning Number Series

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