Question

Find the smallest number by which 4851 must be multiplied so that the product becomes a perfect square.

Answer 1

By factorizaton :
$4851=3\times 3\times 7\times 7\times 11$

Grouping the factors in pairs, we see that 11 is left unpaired $\therefore$ The least number is 11 by which multiplying 4851, we get a perfect sqaure.