Question

Find the least number that is to be subtracted from 4000 to make it perfect square​

Answer 1

Step-by-step explanation:

let the number be X

the nearest perfect square to 4000 is

$\: { 63}^{2} = 3969$

hence by the given condition-

$\sqrt{4000 - x} = 63$

squaring you get

$4000 - x = 3969$

hence

$x = 4000 - 3969$

x=31

Answer 2

4000 - 31 = 3969
Square root of 3969 is 63