Question: what is the greatest common factor between 48 and 6?
Answer: The factors of 48 are 48, 24, 16, 12, 8, 6, 4, 3, 2, 1. The common factors of 6 and 48 are 6, 3, 2, 1, intersecting the two sets above. In the intersection factors of 6 ∩ factors of 48 the greatest element is 6. Therefore, the greatest common factor of 6 and 48 is 6.