Find the odd one out: 3, 5, 7, 12, 17, 19 MCQ with Answer and Explanation

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Find the odd one out: 3, 5, 7, 12, 17, 19

A. 19

B. 12

C. 7

D. 17

Answer: Option B

Solution (By JKSSB Mock Tests)

All others are prime numbers while 12 is not.

This question belongs to: Reasoning Mental Reasoning

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Practice More Mental Reasoning Questions

Question #1

Find the missing term: 1, 2, 5, 10, 17, 26, ?

A. 35

B. 36

C. 37

D. 38

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Correct Answer: Option C

Explanation:
Differences are +1, +3, +5, +7, +9, so next difference is +11: 26+11=37.

This question belongs to: Reasoning Mental Reasoning

Question #2

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

A. 144

B. 125

C. 121

D. 100

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Correct Answer: Option B

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

Question #3

Statements: All men are women. All women are human. Conclusions: I. All men are human. II. Some human are women.

A. Neither follows

B. Only II follows

C. Both follow

D. Only I follows

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Correct Answer: Option C

Explanation:
All men are women and all women are human ⇒ All men are human. Some human are women follows. Both.

This question belongs to: Reasoning Mental Reasoning

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