Question: what is the greatest common factor in 16 and 14?
Answer: The factors of 14 are 14, 7, 2, 1. The common factors of 16 and 14 are 2, 1, intersecting the two sets above. In the intersection factors of 16 ∩ factors of 14 the greatest element is 2. Therefore, the greatest common factor of 16 and 14 is 2.