Question

Find the smallest positive integer with which one has to multiply $450$ to get a perfect square.

Answer 1

The given number is $450$

But, $450=5\times 5\times 3\times 3\times 2=5^2\times 3^2\times 2$
Here, $2$ occur only once.

So, to get a perfect square we need to multiply by $2$
Thus, we have to multiply by $450$ by $2$ to get a perfect square.