a) 15;24
15=3x5
24=2³x3
c.m.m.d.c (15,24)=3
c.m.m.m.c(15,24)=3x2³x5=120
b)20;32
20=2²x5
32=2²x2³=2^5
cmmdc(20,32)=2²=4
cmmmc(20,32)=2^5x5=32x5=160
c)18;27
18=2x3²
27=3³
cmmdc(18,27)=3²
cmmmc(18,27)=2x3³=54
d)14;22
14=2x7
22=2x11
cmmdc(14,22)=2
cmmmc(14,22)=2x7x11=154
e)30;25
30=2x3x5
25=5²
cmmdc(30,25)=5
cmmmc(30,25)=2x3x5²=150
f)40;30
40=2³x5
30=2x3x5
cmmdc(40,30)=2x5=10
cmmmc(30,40)=2³x3x5=120
