What will come in place of the question mark (?) in the following number series? 11, 23, 47, 95, ? MCQ with Answer and Explanation

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What will come in place of the question mark (?) in the following number series? 11, 23, 47, 95, ?

A. 191

B. 187

C. 185

D. 189

Answer: Option A

Solution (By JKSSB Mock Tests)

Each term is obtained by multiplying by 2 and adding 1. (11×2)+1=23, (23×2)+1=47, (47×2)+1=95. The next term is (95×2)+1=191.

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? 20, 18, 15, 11, ?

A. 5

B. 7

C. 6

D. 8

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Correct Answer: Option C

Explanation:
The differences are: -2, -3, -4. The next difference is -5. Therefore, 11-5=6.

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, 18, 54, 162, ?

A. 648

B. 324

C. 810

D. 486

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Correct Answer: Option D

Explanation:
Each term is multiplied by 3. Therefore, 162×3=486.

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, 5, 9, 17, 33, ?

A. 63

B. 65

C. 61

D. 67

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Correct Answer: Option B

Explanation:
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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