What will come in place of the question mark (?) in the following number series? 11, 15, 19, 23, ? MCQ with Answer and Explanation

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What will come in place of the question mark (?) in the following number series? 11, 15, 19, 23, ?

A. 25

B. 29

C. 31

D. 27

Answer: Option D

Solution (By JKSSB Mock Tests)

The series increases by 4 each time. Therefore, 23+4=27.

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, 5, 13, 29, ?

A. 61

B. 63

C. 57

D. 59

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Correct Answer: Option A

Explanation:
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

Question #2

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What will come in place of the question mark (?) in the following number series? 4, 16, 32, 52, 76, ?

A. 100

B. 104

C. 96

D. 98

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Correct Answer: Option B

Explanation:
The differences are: 12, 16, 20, 24. These are increasing by 4. The next difference is 28. Therefore, 76+28=104.

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, 10, 15, 20, ?

A. 30

B. 22

C. 25

D. 24

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Correct Answer: Option C

Explanation:
The series is increasing by 5 each time. Therefore, the next term is 20+5=25.[reference:7]

This question belongs to: Reasoning Number Series

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