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.
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.
Every square of a 4 digit number has more than four digits.
'5' is the UNIT digit. '6' is the 'tenths' digit. '9' is the 'hundredths' digit.
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 .
A number is made up from digits in the numeral system. We often use the decimal system in which we use 10 digits, In writing the any number, many digits are used, even repitation of digits. when we write any number using the digits, the last digit ( from right side ) in that number is called unit digit. for example in the number 9814868980, here 0 is called unit digit.
If one digit is a prime number, that digit must be 2, 3, 5, or 7. If one digit is a square, that digit must be 1, 4, or 9. If one digit is neither a prime number or a square, that digit must be 0, 6, or 8. So, 248 is a possible number. Another possibility is 436. There are other possibilities, as well.