What is the greatest common factor of 12 and 30?

The greatest common factor (GCF) of two numbers is the largest number that divides evenly into both numbers.

To find the GCF of 12 and 30, you can list the factors of each number and find the largest factor that is common to both.

Factors of 12: 1, 2, 3, 4, 6, 12 Factors of 30: 1, 2, 3, 5, 6, 10, 15, 30

The common factors of 12 and 30 are 1, 2, 3, and 6. The largest of these common factors is 6. Therefore, the greatest common factor of 12 and 30 is 6.