a:6=c r3
a:8=c' r3
a:9=c" r3
a=6c+3
a=8c'+3
a=9c"+3
a-3=6c
a-3=8c'
a-3=9c"
M₆=6,12,18,24,30,36,42,48,5,60,66,72
M₈=8,16,24,32,40,48,56,64,72
M₉=9,18,27,36,45,54,63,72
multilpu comun al lui6-8-9 este 72
numarul cautat este 72+3=75
75:6=12 r3
75:8= 9 r3
75:9= 8 r3
8=2³
12=2²*3
c.m.m.m.c=2³*3
c.m.m.d.c.=2²
36=2²*3²
54=2*3³
c.m.m.m.c=2²*3³
c.m.m.d.c.=2*3²