4. If N is the set of natural numbers that are factors of 20, choose the selection below that correctly shows this set in roster
form.
{2, 4, 5, 10}
{2, 4, 6, 8, 10, 12, 14, 16, 18, 20}
{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20}
{1, 2, 4, 5, 10, 20}
5. Suppose U = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10} is the universal set, and P = {1, 4, 9}. What is ?
{2, 3, 5, 6, 7, 8}
{2, 4, 6, 8}
{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}
{2, 3, 5, 6, 7, 8, 10}