What will come in place of the question mark (?) in the following number series? 2, 8, 18, 32, ? MCQ with Answer and Explanation

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What will come in place of the question mark (?) in the following number series? 2, 8, 18, 32, ?

A. 42

B. 50

C. 40

D. 48

Answer: Option B

Solution (By JKExamLibrary)

The pattern is: 2×1²=2, 2×2²=8, 2×3²=18, 2×4²=32. The next term is 2×5²=50.

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, 16, 25, ?

A. 49

B. 30

C. 42

D. 36

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Correct Answer: Option D

Explanation:
The series consists of squares of consecutive integers: 2²=4, 3²=9, 4²=16, 5²=25. The next number should be the square of 6, which is 36.[reference:2]

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, 17, 33, 65, ?

A. 121

B. 125

C. 123

D. 129

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Correct Answer: Option D

Explanation:
Each term is obtained by multiplying by 2 and subtracting 1. (9×2)-1=17, (17×2)-1=33, (33×2)-1=65. The next term is (65×2)-1=129.

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, 12, 48, 192, ?

A. 384

B. 768

C. 960

D. 576

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Correct Answer: Option B

Explanation:
Each term is multiplied by 4. Therefore, 192×4=768.

This question belongs to: Reasoning Number Series

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