Sets

If A = {1, 5, 10, 20, 30} then

If A = {odd numbers} and B = {even numbers} thus
A ∪ B is equal to:

Given A={2, 4, 6,...}, B = {5, 10, 15, 20,...} and C = {10, 20, 30, ...},
then (A ∩ B) ∩ C is equal to:

What is set {10, 20, 30} of set {0, 10, 20, 30}?

Let A and B are two sets, then A - B is

If A ∪ B = ∅ then:

If A ∪ B = A ∩ B then:

∅' is the set:

(A ∩ B)' is the set:

If A, B, C be any three sets, then (A - B) ∩ (A - C) is: