1a){3,4]=3x4=12
[2,4,8]=8
c)10=2x5
15=3x5
30=3x2x5
[10,15,30]=2x3x5=30
d)[2,4,5]=4x5=20
e)20=2²x5
40=2³x5
50=2x5²
[20,40,50]=2³x5²=200
f)[4,8,16]=16
g)[12,24,36]=2³x3²=72
h)[4,6,12]=2²x3=12
ex.3
a)24=2³x3
48=2⁴x3
72=2³x3²
[24,48,72]=2⁴x3²=144
b)90=3²x2x5
100=2²x5²
300=3x2²x5²
[90,100,300]=2²x5²x3=300
c)180=2²x3²x5
320=2⁶x5
432=2⁴x3³
[180,320,432]=2⁶x3³x5=4320
d)135=5x3³
270=3³x2x5
588=2²x3x7²
[135,270,588]=5x3³x2²x7²=26460
e)288=2⁵x3²
1260=2²x3²x5x7
[288,1260]=2⁵x3²x5x7=10080
f)1890=3³x7x2x5
2268=3⁴x7x2²
[1890,2268]=3⁴x7x2²x5=11340
