Given: Factors 2, 3, 5 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, ... 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, ... 5, 10, 15, 20, 25, 30, ... R = 2, 3, 4, 5, 6, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 22, 24, 25, 26, 27, 28, 30, ...