What will come in place of the question mark (?) in the following number series? 7, 19, 35, 55, 79, ? MCQ with Answer and Explanation

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What will come in place of the question mark (?) in the following number series? 7, 19, 35, 55, 79, ?

A. 99

B. 107

C. 101

D. 103

Answer: Option B

Solution (By JKExamLibrary)

The differences are: 12, 16, 20, 24. These are increasing by 4. The next difference is 28. Therefore, 79+28=107.

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? 4, 9, 19, 39, ?

A. 83

B. 77

C. 79

D. 81

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Correct Answer: Option C

Explanation:
Each term is obtained by multiplying by 2 and adding 1. (4×2)+1=9, (9×2)+1=19, (19×2)+1=39. The next term is (39×2)+1=79.

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? 7, 14, 28, 56, ?

A. 112

B. 98

C. 126

D. 84

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Correct Answer: Option A

Explanation:
Each term is multiplied by 2. Therefore, 56×2=112.

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? 10, 17, 26, 37, 50, ?

A. 67

B. 61

C. 63

D. 65

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Correct Answer: Option D

Explanation:
The differences are: 7, 9, 11, 13. These are consecutive odd numbers. The next difference is 15. Therefore, 50+15=65.

This question belongs to: Reasoning Number Series

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