In m x n = 225, m = two digit, n = 1 digit. What do m & n represent? List all possible answers.

In the equation m x n = 225, m represents the tens digit and n represents the units (ones) digit of a two-digit number.

The possible values for m are:
10, 15, 18, 25

The possible values for n are:
9, 5, 1