What will come in place of the question mark (?) in the following number series? 4, 13, 28, 49, ? MCQ with Answer and Explanation

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What will come in place of the question mark (?) in the following number series? 4, 13, 28, 49, ?

A. 74

B. 76

C. 78

D. 72

Answer: Option B

Solution (By JKExamLibrary)

The differences are: 9, 15, 21. These are increasing by 6. The next difference is 27. Therefore, 49+27=76.

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? 0, 6, 24, 60, 120, ?

A. 210

B. 180

C. 240

D. 360

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Correct Answer: Option A

Explanation:
The pattern is: 1³-1=0, 2³-2=6, 3³-3=24, 4³-4=60, 5³-5=120. The next term is 6³-6=210.

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? 3, 5, 9, 17, ?

A. 35

B. 29

C. 33

D. 31

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Correct Answer: Option C

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

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? 4, 6, 9, 13, ?

A. 18

B. 19

C. 17

D. 16

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Correct Answer: Option A

Explanation:
The differences are: 2, 3, 4. The next difference is 5. Therefore, 13+5=18.

This question belongs to: Reasoning Number Series

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