18 : 2 : 3 = 3; 8 : 2 : 2 = 2; 3 × 3 × 2 = 18; 12 : 3 × 2 = 8; 27 : 3 × 2 = 18; 16 : 2 : 2 = 4; 18 : 3 × 2 = 12; 24 : 3 : 2 = 4; 15 : 3 × 2 = 10; 18 : 2 × 3 = 27; 27 : 9 × 2 = 6; 27 : 3 : 3 = 3.