Which of the following is definitely not a perfect square?

173

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256

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289

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625

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Solution

The correct option is A
173

We can observe 173 ends with 3.

A perfect square number never ends with 2, 3, 7, 8.

Hence, 173 is definitely not a perfect square.

Suggest Corrections

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128

100

64

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625

16^{2} = 256

\frac{8}{\sqrt{625}} \times \frac{50}{\sqrt{256}}

{(\frac{625}{256})}^{- \frac{3}{4}}

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