a) A = {6, 5, 4, 3, 1}, B = {1, 2, 3}
b) A = {10, 20, 30, ..., 90}, B = {5, 10, 15, ..., 95}
c) A = {1, 3, 5, ..., 99}, B = {2, 4, ..., 100}
d) A - zbiór cyfr, B = {0, 5, 10, 15}​