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Question

Which of the following is definitely not a perfect square?


A

144

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B

169

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C

147

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D

121

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Solution

The correct option is C

147


We can observe 147 ends with 7.

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

Hence, 147 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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