Răspuns :
27:2=13, rest 1
27:8=3, rest 3
27:9=3, rest 0
27:3=9, rest 0
27:4=6, rest 3
27:5=5, rest 2
Toate impartirile au rest in afara de 27:9 si 27:3
27:8=3, rest 3
27:9=3, rest 0
27:3=9, rest 0
27:4=6, rest 3
27:5=5, rest 2
Toate impartirile au rest in afara de 27:9 si 27:3