Question: what is the greatest common factor (gcf) of 72 and 96?
Answer: The common factors of 96 and 72 are 24, 12, 8, 6, 4, 3, 2, 1, intersecting the two sets above. In the intersection factors of 96 ∩ factors of 72 the greatest element is 24. Therefore, the greatest common factor of 96 and 72 is 24.