Question

15931 subtract from the given number so that number becomes a perfect square

Answer 1

√15931 = 126.22

So nearest perfect square is 126^2
126^2 = 15876

So you need to subtract= 15931 - 15876 = 55

Answer 2

15931 is not a perfect square.

if we substract 55 from the given number , then we will get

15876.

it is a square of 126..

so , if we subtract 55 from the given number , then it becomes a perfect square.