Răspuns :
16:2=8:2=4:2=2:2=1 16=2x2x2x2
48:2=24:2=12:2=6:2=3:3=1 48=2x2x2x3
72:2=36:2=18:2=9:3=3:3=3 72=2x2x2x3x3
(16,48,72)=2x2x2=8
16:2=8:2=4:2=2:2=1 16=2x2x2x2
48:2=24:2=12:2=6:2=3:3=1 48=2x2x2x3
72:2=36:2=18:2=9:3=3:3=3 72=2x2x2x3x3
(16,48,72)=2x2x2=8