The Universal Set U = {1, 2, 3, ……, 19, 20} and subsets A, B, C of U are given by

A = (multiples of five)

B = (multiples of four)

C = (multiples of three)

Find A ∩ C.

A. {15, 18, 20}

B. {3, 6, 9, 12, 15, 18}

**C**. {15}

D. {5, 10, 15, 20}

The Universal Set U = {1, 2, 3, ……, 19, 20} and subsets A, B, C of U are given by

A = (multiples of five)

B = (multiples of four)

C = (multiples of three)

List the elements of B.

A. {2, 4, 8, 10, 18, 20}

B. {3, 6, 9, 12, 15, 18}

**C**. {4, 8, 12, 16, 20}

D. {5, 10, 15, 20}

If U = {1, 2, 3, 4, 5}, A = {1, 2} and B = {2, 3}, find (A ∩ B)’

**A**. {1, 3, 4, 5} B. {1, 2} C. {2, 3,} D. {1, 4, 5}