(54,36) = (18, 36) = (18, 18) = 18(20,30) = (20, 10) = (10,10) = 10(60,18) = (42, 18) = (24, 18) = (6, 18) = (6, 12) = (6, 6) = 6(64, 32) = (32, 32) = 32(45, 75) = (45, 30) = (15, 30) = (15, 15) = 15(...