Answer:

1. A∩C=3, 7, 21, 22

2. A∩B∩C=21, 22

3. A∪B=1, 2, 3, 4, 5, 7, 8, 10, 13, 14, 15, 18, 20, 21, 22

4. A-B=0, 6, 9, 11, 12

5. (A∪B)-C=16, 17, 19

Answer:

1. {3,7,21,22}

2. {21,22}

3. {1,2,3,4,5,7,8,10,13,14,15,18,20,21,22}

4. {1,3,5,7,8,18}

5. {1,2,4,5,8,10,13,14,18,20}