Find the smallest number by which the given number must be multiplied so that the product become a perfect square: $605$.

Given: A number $605$.

To do: To find the smallest number by which the given number must be multiplied so that the product become a perfect square.

Solution:
 

Given number$=605$

Factors of the given number$=5\times11\times11=5\times11^2$

Therefore, The least number is $5$ to multiply the $605$ to make it perfect square.