What is the gcf of 12 15 22?

Answer 1

The greatest common factor of a number is the largest factor shared between the numbers you're looking at, otherwise known as common. So the factors of 12 are 1, 2, 3, 4, 6, and 12; the factors of 15 are 1, 3, 5, 15; and the factors of 22 are 1, 2, 11, 22. The only common factor here is 1, and is thus the GCF of your three numbers.