What is the gcf of 36 and 90?

The GCF (Greatest Common Factor) of 36 and 90 is 18.

To find the GCF, we can list the factors of both numbers and find the largest one that they have in common.

Factors of 36: 1, 2, 3, 4, 6, 9, 12, 18, 36 Factors of 90: 1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90

The largest factor that both 36 and 90 share is 18, therefore the GCF is 18.