Find the gcf of 6, 15, and 36. a. 2 b. 3 c. 6 d. 180

To find the GCF, you find the prime factors that have a product of each number. Then, you can compare and see which numbers there are in common.

6=2x3

15=3x5

36=2x2x3x3

Here, the only common factor is 3, therefore the answer is b.