PPrriimmarryy56 Date : (1) Find the GCF and LCM of 16 and 20 Sol 16 = 2 × 2 × 2 × 2 20 = 2 × 2 × 5 GCF = 2 × 2 = 4 225 LCM = 2 × 2 × 2 × 2 × 5 = 80 22 Determine the G.C.F and L.C.M of 42 and 36 G.C.F= 2 X 3 = 6 L.C.M= 7 X 2 X 3 X 2 X 3 = 252 3