Question

find the greatest number of 5 digits which is a perfect square

Answer 1

We know that the largest 5 digit number is 99999.

divide.

So here we can see that 99999 is not a perfect square as it leaves 143 as the remainder while finding it s square root.

So for finding 5 digit perfect square we will have to subtract 143 from 99999

=> 99999-143 = 99856

Hence 99856 is a perfect square whose square root is √99856 = 316.

Answer 2

99856 or 316 square is the answer