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. 189

B. 191

C. 185

D. 187

Answer: Option B

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? 1, 3, 7, 15, ?

A. 31

B. 30

C. 35

D. 32

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Correct Answer: Option A

Explanation:
Each term is obtained by multiplying the previous term by 2 and adding 1. (1×2)+1=3, (3×2)+1=7, (7×2)+1=15. The next term is (15×2)+1=31.

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? 9, 16, 25, 36, ?

A. 81

B. 64

C. 49

D. 42

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Correct Answer: Option C

Explanation:
The series consists of squares of consecutive integers starting from 3: 3², 4², 5², 6². The next term is 7²=49.

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? 1, 1, 2, 3, 5, 8, 13, ?

A. 20

B. 24

C. 18

D. 21

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Correct Answer: Option D

Explanation:
This is a Fibonacci series where each term is the sum of the previous two terms. 13+8=21.[reference:9]

This question belongs to: Reasoning Number Series

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