What will come in place of the question mark (?) in the following number series? 1, 10, 100, ? MCQ with Answer and Explanation

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What will come in place of the question mark (?) in the following number series? 1, 10, 100, ?

A. 500

B. 1000

C. 10000

D. 2000

Answer: Option B

Solution (By JKSSB Mock Tests)

Each term is multiplied by 10. Therefore, 100×10=1000.

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

A. 210

B. 222

C. 220

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 #2

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What will come in place of the question mark (?) in the following number series? 6, 15, 28, 45, ?

A. 62

B. 64

C. 60

D. 66

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Correct Answer: Option D

Explanation:
The differences are: 9, 13, 17. These are increasing by 4. The next difference is 21. Therefore, 45+21=66.

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? 6, 18, 54, 162, ?

A. 486

B. 648

C. 324

D. 810

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Correct Answer: Option A

Explanation:
Each term is multiplied by 3. Therefore, 162×3=486.

This question belongs to: Reasoning Number Series

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