Răspuns:
a)15:1, 3, 5, 15
12: 1, 2, 3, 4, 6, 12
div. com.=3
c.m.m.d.c=3
b)18: 1, 2, 3, 6, 9, 18
24: 1, 2, 3, 4, 6, 8, 12, 24
div. com.= 1, 2, 3, 6
c.m.m.d.c=6
c)4: 1, 2, 4
6: 1, 2, 3, 6
8: 1, 2, 4, 8
div. com.= 1, 2
c.m.m.d.c=2
f)20: 1, 2, 4, 5, 10, 20
40: 1, 2, 4, 5, 8, 10, 20, 40
60: 1, 2, 3, 4, 5, 6, 10, 15, 20, 30, 60
div. com.=1, 2, 4, 5, 10, 20
c.m.m.d.c=20
Am pus semnul ,,împărțit", deoarece nu găseam semnul potrivit!