Find odd one out of the series: 16, 25, 36, 72, 144, 196 and 225.

Option b: 72. Solution: Let's check the perfect square property for each number in the series: - 16 = 4^2 - 25 = 5^2 - 36 = 6^2 - 144 = 12^2 - 196 = 14^2 - 225 = 15^2 - 72 is not a perfect square (8^2 = 64 and 9^2 = 81). Since 72 is the only term that is not a perfect square, it is the odd man out. Hence, Option B is the correct answer.

Find odd one out of the series: $16, 25, 36, 72, 144, 196$ and $225$.

The correct answer is Option b: 72. Let's check the perfect square property for each number in the series: - $16 = 4^2$ - $25 = 5^2$ - $36 = 6^2$ - $144 = 12^2$ - $196 = 14^2$ - $225 = 15^2$ - $72$ is not a perfect square ($8^2 = 64$ and $9^2 = 81$). Since $72$ is the only term that is not a perfect square, it is the odd man out. Hence, **Option B** is the correct answer.

Number Series, Coding, Odd Man OutPYQ Dec 23Question 2172 of 217

All Questions

Find odd one out of the series: $\displaystyle 16, 25, 36, 72, 144, 196$ and $\displaystyle 225$ .

Options

A36

B72

C196

D225

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Correct Answer

✅ Option b — 72

All Options:

A36
B72
C196
D225

Detailed Solution & Explanation

Let's check the perfect square property for each number in the series:
-

\displaystyle 16 = 4^2

\displaystyle 25 = 5^2

\displaystyle 36 = 6^2

\displaystyle 144 = 12^2

\displaystyle 196 = 14^2

\displaystyle 225 = 15^2

\displaystyle 72

is not a perfect square (

\displaystyle 8^2 = 64

and

\displaystyle 9^2 = 81

).

Since

\displaystyle 72

is the only term that is not a perfect square, it is the odd man out.

Hence, **Option B** is the correct answer.

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Find odd one out of the series: 16,25,36,72,144,196\displaystyle 16, 25, 36, 72, 144, 19616,25,36,72,144,196 and 225\displaystyle 225225.