Răspuns :

n:6= c rest r
r=2•c
n=6•c+r r<6
n=6•c+2•c
n=8•c
o luam pe cazuri
I. r=0
n=8•0=0

II. r=1
n=8•1=8

III. r=2
n=8•2=16

IV. r=3
n=8•3=24

V. r=4
n=8•4=32

VI. r=5
n=8•5=40

deci n poate fi 0, 8, 16, 24, 32, 40