what is the gcf of 72 and 96?
find the prime factorizations: 72 = 2 x 2 x 2 x 3 x 3 96 = 2 x 2 x 2 x 2 x 2 x 3 they have in common three factors of 2 and one factor of 3: 2 x 2 x 2 x 3 = 24, the gcf