What will come in place of the question mark (?) in the following number series? 3, 5, 9, 17, 33, ? MCQ with Answer and Explanation

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What will come in place of the question mark (?) in the following number series? 3, 5, 9, 17, 33, ?

A. 65

B. 63

C. 61

D. 67

Answer: Option A

Solution (By JKSSB Mock Tests)

Each term is obtained by multiplying by 2 and subtracting 1. (3×2)-1=5, (5×2)-1=9, (9×2)-1=17, (17×2)-1=33. The next term is (33×2)-1=65.

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, 13, 22, 33, ?

A. 44

B. 46

C. 43

D. 42

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Correct Answer: Option B

Explanation:
The differences are: 7, 9, 11. These are increasing by 2. The next difference is 13. Therefore, 33+13=46.

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? 5, 14, 27, 44, ?

A. 67

B. 63

C. 65

D. 61

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Correct Answer: Option C

Explanation:
The differences are: 9, 13, 17. These are increasing by 4. The next difference is 21. Therefore, 44+21=65.

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? 5, 8, 12, 17, ?

A. 21

B. 22

C. 24

D. 23

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Correct Answer: Option D

Explanation:
The differences are: 3, 4, 5. The next difference is 6. Therefore, 17+6=23.

This question belongs to: Reasoning Number Series

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