How to find the least no. which must be added to 9225 to get a perfect square..

Answer :

First we find value of $\sqrt{9225}$ by long division method , As  :

Here we can see that $\sqrt{9225}$ =96 and remainder 9 , So

Next perfect square is =  97² = 9409

So,

Least number that must be added  to 9225 to obtain perfect square  =  9409 - 9225 =  184                            ( Ans )