What will come in place of the question mark (?) in the following number series? 3, 11, 27, 59, ? MCQ with Answer and Explanation

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What will come in place of the question mark (?) in the following number series? 3, 11, 27, 59, ?

A. 125

B. 127

C. 123

D. 121

Answer: Option C

Solution (By JKExamLibrary)

Each term is obtained by multiplying by 2 and adding 5. (3×2)+5=11, (11×2)+5=27, (27×2)+5=59. The next term is (59×2)+5=123.

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, 16, 32, 52, 76, ?

A. 98

B. 96

C. 100

D. 104

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Correct Answer: Option D

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 #2

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What will come in place of the question mark (?) in the following number series? 10, 20, 30, 40, 50, ?

A. 70

B. 60

C. 55

D. 65

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Correct Answer: Option B

Explanation:
The series increases by 10 each time. Therefore, 50+10=60.

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, 9, 19, 33, 51, ?

A. 71

B. 69

C. 67

D. 73

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Correct Answer: Option A

Explanation:
The differences are: 6, 10, 14, 18. These are increasing by 4. The next difference is 22. Therefore, 51+22=73.

This question belongs to: Reasoning Number Series

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