The one-digit number divisible by 10 is 0.
A number is divisible by 10 if and only if its last digit is 0. This is because 10 = 2 * 5, so for a number to be divisible by 10, it must be divisible by both 2 and 5. Divisibility by 2 requires the last digit to be even (0, 2, 4, 6, or 8), and divisibility by 5 requires the last digit to be either 0 or 5. Therefore, the only digit that satisfies both conditions is 0.
Here's why other digits aren't divisible by 10:
- 1, 2, 3, 4, 5, 6, 7, 8, 9: None of these numbers can be divided by 10 without leaving a remainder.
In summary, the only single-digit number divisible by 10 is 0.
