1002 = 10000 which is the smallest possible 5 digit number. So we have to go 1 smaller which is 992 = 9801
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Every square of a 4 digit number has more than four digits.
9,801 = 992Another possibility: The 4-digit number 9998. It's the square of 9949 .
16, which is the square of 4, is a two digit even number.
1352
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