Question: what is the greatest common factor of 48 and 72?
Answer: Method 1: factors of 72: 1, 2, 3, 4, 6, 8, 12, 24, 9, 18, 36, 72 factors of 48: 1, 2, 3, 4, 6, 8, 12, 24, 16, 48 Therefore, the greatest common factor of 48 and 72 is 24.