How can I find the greatest common factor of 12 and 18?

To find the greatest common factor (GCF) of 12 and 18, you can list the factors of each number.

The factors of 12 are 1, 2, 3, 4, 6, and 12.

The factors of 18 are 1, 2, 3, 6, 9, and 18.

The common factors are 1, 2, 3, and 6.

The greatest common factor is 6.

Therefore, the GCF of 12 and 18 is 6.

In general, to find the GCF of two numbers, list their factors and determine the greatest common factor among them.