The largest 3 digit square number is 961 because 31*31 = 961
The largest 3-digit number - not itself a perfect square - is 999. Calculate its square root, round the answer down, then square the answer again.
The largest 5 digit perfect square is 99856 = 3162
9801
999
961
9,998,244
961 961
9,801 = 992Another possibility: The 4-digit number 9998. It's the square of 9949 .
It's 4. (31,622)2 = 999,950,884 .
Thghj
It is: 31*31 = 961
961