It's 4. (31,622)2 = 999,950,884 .
10000 is the square of 100 so you're looking for the square of 99 which is 9801.
4
x64 is not a perfect square any number if it is a 3-digit perfect square and ending with 4 it can be 144,324 ,484 and 784 because the number is ending with 4 but the tens digit is not matching to any of the option so it is not a perfect square
992 = 9,801
4
4
4
4
9,801 = 992Another possibility: The 4-digit number 9998. It's the square of 9949 .
1024, square of 32.
The largest square factor of 244 is 4.