a) 12 = 2^2*3
15 = 3*5
c.m.m.m.c = 2^2*3*5 = 60
Urmatorii multipli: 120, 180, 240, 300
b) 18 = 2*3^2
30 = 2*3*5
c.m.m.m.c. = 2*3^2*5 = 90
Urmatorii multipli: 180, 270, 360, 450
c) 28 = 2^2*7
36 = 2^2*3^2
c.m.m.m.c. = 2^2*3^2*7 = 252
Urmatorii multipli: 504, 756, 1008, 1260
