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

A. 67

B. 63

C. 69

D. 65

Answer: Option D

Solution (By JKExamLibrary)

Each term is obtained by multiplying by 2 and subtracting 1. (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? 3, 9, 27, 81, ?

A. 162

B. 243

C. 405

D. 324

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Correct Answer: Option B

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

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? 6, 10, 16, 24, ?

A. 34

B. 36

C. 32

D. 30

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Correct Answer: Option A

Explanation:
The differences are: 4, 6, 8. These are increasing by 2. The next difference is 10. Therefore, 24+10=34.

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, 75, ?

A. 104

B. 100

C. 108

D. 102

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Correct Answer: Option C

Explanation:
The pattern is: 3×1²=3, 3×2²=12, 3×3²=27, 3×4²=48, 3×5²=75. The next term is 3×6²=108.

This question belongs to: Reasoning Number Series

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