What will come in place of the question mark (?) in the following number series? 3, 5, 8, 12, 17, ? MCQ with Answer and Explanation

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What will come in place of the question mark (?) in the following number series? 3, 5, 8, 12, 17, ?

A. 22

B. 24

C. 21

D. 23

Answer: Option D

Solution (By JKSSB Mock Tests)

The differences are: 2, 3, 4, 5. The next difference is 6. Therefore, 17+6=23.

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? 9, 17, 27, 39, 53, ?

A. 65

B. 69

C. 71

D. 67

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Correct Answer: Option B

Explanation:
The differences are: 8, 10, 12, 14. These are increasing by 2. The next difference is 16. Therefore, 53+16=69.

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? 2, 10, 30, 68, 130, ?

A. 220

B. 222

C. 210

D. 200

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Correct Answer: Option B

Explanation:
The pattern is: 1³+1=2, 2³+2=10, 3³+3=30, 4³+4=68, 5³+5=130. The next term is 6³+6=222.

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? 50, 49, 47, 44, ?

A. 42

B. 43

C. 41

D. 40

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Correct Answer: Option D

Explanation:
The differences are: -1, -2, -3. The next difference is -4. Therefore, 44-4=40.

This question belongs to: Reasoning Number Series

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