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0 votes
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in Squares And Square Roots by (30.8k points)
closed by

Which of the following numbers is not a perfect square? 

A. 3600 

B. 6400 

C. 81000 

D. 2500

1 Answer

+1 vote
by (31.2k points)
selected by
 
Best answer

We know that, 

As per the properties of square, 

All the numbers that end with odd numbers of zeroes are not a perfect square 

Hence, 

Considering the property, we get 

The number 81000 is not a perfect square 

As the number of zeroes of this number is 3. 

Therefore, 

Option (C) is the correct option.

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