Răspuns:
A) {1,2,3,4,5,6,7,8,9}
B) {1,2,3,4,5,6,7,12}
C) {1,2,3,5,6,7,8,9,12}
D)nu se vede cerinta
E){1,2,3,7}
F){7}
G){1,2,3,4,5,6,7,8,9,12}
H)nu se vede cerinta
I) {1,2,3,4}
J){5,6,8,9}
K){4,5,6}