What is the units digit?

The units digit is the rightmost digit of a number. It is also known as the ones digit or the last digit. The value of the units digit represents how many ones are in the number. For example, in the number 25, the units digit is 5, which means there are five ones in the number.

The units digit is important in many mathematical operations, including addition, subtraction, multiplication, and division. It is often used to check the accuracy of calculations, especially in long calculations.

In some cases, the units digit may have a special significance. For example, even numbers always have a units digit of 0, 2, 4, 6, or 8, while odd numbers always have a units digit of 1, 3, 5, 7, or 9. Similarly, the units digit of a number raised to a power may follow a repeating pattern known as a cyclical pattern.