Find the odd one out: 11, 13, 17, 21 MCQ with Answer and Explanation

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Find the odd one out: 11, 13, 17, 21

A. 17

B. 13

C. 21

D. 11

Answer: Option C

Solution (By JKSSB Mock Tests)

11, 13 and 17 are prime numbers; 21 is composite (3 x 7).

This question belongs to: Reasoning Classification (Odd One Out)

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Practice More Classification (Odd One Out) Questions

Question #1

Find the odd one out: Hindi, Marathi, Sanskrit, English

A. Sanskrit

B. English

C. Hindi

D. Marathi

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Correct Answer: Option B

Explanation:
Hindi, Marathi and Sanskrit are Indo-Aryan languages; English is not an Indo-Aryan language.

This question belongs to: Reasoning Classification (Odd One Out)

Question #2

Find the odd one out: Monitor, Printer, Speaker, Scanner

A. Scanner

B. Monitor

C. Printer

D. Speaker

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Correct Answer: Option A

Explanation:
Monitor, Printer and Speaker are output devices; Scanner is an input device.

This question belongs to: Reasoning Classification (Odd One Out)

Question #3

Find the odd one out: Red, Green, Blue, Yellow

A. Red

B. Green

C. Blue

D. Yellow

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Correct Answer: Option B

Explanation:
Red, Blue and Yellow are primary colours; Green is a secondary colour.

This question belongs to: Reasoning Classification (Odd One Out)

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