Find the missing term: 1, 2, 4, 7, 11, ? MCQ with Answer and Explanation

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Find the missing term: 1, 2, 4, 7, 11, ?

A. 17

B. 16

C. 15

D. 14

Answer: Option B

Solution (By JKSSB Mock Tests)

Differences: +1, +2, +3, +4, so next difference is +5: 11+5=16.

This question belongs to: Reasoning Mental Reasoning

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Question #1

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In a row, Rina is 10th from left and Seema is 8th from right. If they interchange positions, Rina becomes 20th from left. How many students are in the row?

A. 26

B. 27

C. 25

D. 28

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Correct Answer: Option B

Explanation:
After interchange, Rina is at Seema's original position, which is 20th from left and 8th from right. Total = 20+8-1=27.

This question belongs to: Reasoning Mental Reasoning

Question #2

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Find the missing term: 100, 95, 85, 70, 50, ?

A. 35

B. 30

C. 20

D. 25

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Correct Answer: Option D

Explanation:
The differences are -5, -10, -15, -20, so the next difference is -25: 50-25=25.

This question belongs to: Reasoning Mental Reasoning

Question #3

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Find the missing term: 1, 8, 27, 64, ?

A. 125

B. 121

C. 144

D. 100

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Correct Answer: Option A

Explanation:
The terms are cubes: 1³=1, 2³=8, 3³=27, 4³=64, so next is 5³=125.

This question belongs to: Reasoning Mental Reasoning

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