Unit digit of the square of 54981

Here we will show you two ways of finding the unit digit of the square of 54981. First, we will define what the unit digit of the square of 54981 means. Next, we will find the unit digit of the square of 54981 using the Rule Method, and then we will find the unit digit of the square of 54981 using the Math Method.

The last digit (one digit) of the product you get when you multiply 54981 by itself is the unit digit of the square of 54981.

Rule Method
The unit digit of any square will never be 2, 3, 7, or 8. It can be only 0, 1, 4, 5, 6, or 9. Furthermore, the unit digit of the square of a number depends on its units digit. In other words, the unit digit of the square of 54981 depends on 1, because that is the last digit in 54981. Here are the rules:

Rule A) If the unit digit of a number is 0, then the unit digit of the square of that number is 0.

Rule B) If the unit digit of a number is 1 or 9, then the unit digit of the square of that number is 1.

Rule C) If the unit digit of a number is 2 or 8, then the unit digit of the square of that number is 4.

Rule D) If the unit digit of a number is 5, then the unit digit of the square of that number is 5.

Rule E) If the unit digit of a number is 4 or 6, then the unit digit of the square of that number is 6.

Rule F) If the unit digit of a number is 3 or 7, then the unit digit of the square of that number is 9.

The unit digit of 54981 is 1, therefore Rule B applies, and the unit digit of the square of 54981 is 1.

Unit digit of the square of 54981 = 1

Math Method
The unit digit of the square of a number depends on its units digit with this method too. Here you multiply the unit digit of the number by itself, and then look at the unit digit of that product. Again, the unit digit of 54981 is 1, so you multiply 1 by itself, and then look at the unit digit to get the answer once again:

1 × 1 = 1
Unit digit of 1 is 1.
Unit digit of the square of 54981 = 1

Of course, instead of using either of the methods above, you can multiply 54981 by itself if you have the time or a calculator, and then identify the unit digit to get the answer to the unit digit of the square of 54981. We did that below to double-check that our answer is correct:

54981 × 54981 = 3022910361
Unit digit of 3022910361 is 1.
Unit digit of the square of 54981 = 1

Unit Digit of the Square Calculator
Please enter another number that we can find the unit digit of the square for.

Unit digit of the square of 54982
Here is the unit digit of the square of the next number on our list.