Find the odd one out: 51, 53, 59, 61 MCQ with Answer and Explanation

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Find the odd one out: 51, 53, 59, 61

A. 59

B. 61

C. 53

D. 51

Answer: Option D

Solution (By JKSSB Mock Tests)

53, 59 and 61 are prime numbers; 51 is composite (3 x 17).

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: Book, Notebook, Diary, Pen

A. Diary

B. Pen

C. Notebook

D. Book

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Correct Answer: Option B

Explanation:
Book, Notebook and Diary are bound paper items; Pen is a writing instrument.

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

Question #2

Find the odd one out: Hydrogen, Oxygen, Nitrogen, Ozone

A. Nitrogen

B. Oxygen

C. Hydrogen

D. Ozone

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Correct Answer: Option D

Explanation:
Hydrogen, Oxygen and Nitrogen exist as diatomic molecules (H2, O2, N2); Ozone is triatomic (O3).

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

Question #3

Find the odd one out: Run, Jump, Sing, Happiness

A. Sing

B. Run

C. Jump

D. Happiness

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Correct Answer: Option D

Explanation:
Run, Jump and Sing are verbs; Happiness is a noun.

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

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