What is units digit?

The units digit refers to the rightmost digit in a number. It is the digit that represents the ones place value.

In mathematics, the units digit can be used to determine certain properties or patterns in numbers. For example, the units digit can be used to determine if a number is even or odd. If the units digit is even (0, 2, 4, 6, or 8), then the number itself is also even. If the units digit is odd (1, 3, 5, 7, or 9), then the number is odd.

The units digit can also be used to determine divisibility. For example, a number is divisible by 2 if its units digit is 0, 2, 4, 6, or 8. Similarly, a number is divisible by 5 if its units digit is 0 or 5.

Furthermore, the units digit can play a role in determining patterns in number sequences or repeating decimals. For example, in a sequence of powers of 2 (2, 4, 8, 16, 32, ...), the units digit repeats in a pattern of 2, 4, 8, 6.

In general, the units digit can provide useful information and help in solving various mathematical problems or understanding number patterns and properties.