A number can be a square number if its first digit is 0, 1, 4, 5, 6 or 9.
The unit digit of the square of 81 will be 1.
As 3844 ends in 4, its square root (if a whole number) will end in 2 or 8. √3844 = 62 so the unit digit is 2.
The unit digit of a number is the digit in the ones place, which is the integer part of the number. In the case of 12.04, the integer part is 12, and the unit digit is 2. Therefore, the value of the unit digit in 12.04 is 2.
9
Here's an example. In the number 382, the number 2 is the "unit's digit" (in the "unit's place"), 8 is the "ten's digit" (in the "ten's place"), and 3 is the "hundred's digit."
16, which is the square of 4, is a two digit even number.
'5' is the UNIT digit. '6' is the 'tenths' digit. '9' is the 'hundredths' digit.
Every square of a 4 digit number has more than four digits.
2.
One hundred is the least three-digit square number. It is formed by 102.
9,801 = 992Another possibility: The 4-digit number 9998. It's the square of 9949 .
It is 63.