What is the gcf for 12 and 18?

The greatest common factor (GCF) or highest common factor (HCF) of two numbers is the largest positive integer that divides both numbers evenly.

To find the GCF of 12 and 18, we can list the factors of each number and find their common factors:

For 12: The factors are 1, 2, 3, 4, 6, and 12. For 18: The factors are 1, 2, 3, 6, 9, and 18.

The common factors of 12 and 18 are 1, 2, 3, and 6. Among these, the largest number is 6. Therefore, the GCF of 12 and 18 is 6.