What will come in place of the question mark (?) in the following number series? 2, 7, 14, 23, ?, 47 MCQ with Answer and Explanation

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What will come in place of the question mark (?) in the following number series? 2, 7, 14, 23, ?, 47

A. 34

B. 28

C. 31

D. 38

Answer: Option A

Solution (By JKExamLibrary)

The differences are: 5, 7, 9, 11, 13 (consecutive odd numbers). The missing term is 23+11=34.[reference:15]

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? 3, 13, 27, 45, 67, ?

A. 85

B. 87

C. 89

D. 93

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Correct Answer: Option D

Explanation:
The differences are: 10, 14, 18, 22. These are increasing by 4. The next difference is 26. Therefore, 67+26=93.

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, 8, 18, 38, ?

A. 84

B. 78

C. 80

D. 82

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Correct Answer: Option B

Explanation:
Each term is obtained by multiplying by 2 and adding 2. (3×2)+2=8, (8×2)+2=18, (18×2)+2=38. The next term is (38×2)+2=78.

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? 1, 3, 9, 27, 81, ?

A. 243

B. 324

C. 162

D. 405

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Correct Answer: Option A

Explanation:
Each term is multiplied by 3. Therefore, 81×3=243.

This question belongs to: Reasoning Number Series

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