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Question

Which of the following is definitely not a perfect square?


A

173

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B

256

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C

289

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D

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.


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A perfect square never ends in 2,3,7 or 8 as last digit.
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