Question 25

The smallest number by which 72 must be multiplied to obtain a perfect square is:

Solution

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Multiply 72 with the least number given in the option and check whether the resultant is perfect square or not

Multiplying 2 with 72 we get the resultant as 144 (square of 12). 

smallest number by which 72 must be multiplied to obtain a perfect square is '2'

Hence, option D is the correct answer.

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