Question

find the greatest three which is the perfect square

Answer 1

Here we can see that 999 is not aperfect square as it leaves 38 as remainder. So if 38 will be addede to 999 then it will become a 4 digit number. Therefore to find the largest 3 digit perfect squarewe will subtract 38 from 999. Hence 961 isthe largest 3 digitperfect square whose squareroot is 31.