FPB DARI 15, 30, 60, DAN 105
FPB 15 = 3 dan 5
FPB 30 = 2 x 3 x 5
FPB 60 = 2 x 3 x 5
FPB 105 = 3 x 5 x 7
l 15 l 30 l 60 l105l 5
l 3 l 6 l 12 l 21 l 3
l 1 l 2 l 4 l 7 l 2
l 1 l 1 l 2 l 7 l 2
l 1 l 1 l 1 l 7 l 7
l 1 l 1 l 1 l 1 l
FPB= 5X3=15