Question

What least number should be added to 521 to get a perfect square

Answer 1

if we add 8,
it becomes=521+8=529,
which is the perfect square of 23,
hence,8 is the smallest number in this case.

Answer 2

Answer:

1. we added 8then we 521+8=529 then we known that the smallest no. is 8 then the perfect square is 23