State what the set is and how the equivalence relation is defined. Show that the relation satisfies the three properties required of equivalence relations. Describe the equivalence classes that the equivalence relation defines.

A = {1, 10, 30} , therefore

R = {(10,10), (1, 1), (30, 30), (1, 30), (30, 1), (10, 1), (1, 10), (10, 30), (30, 10)}