Solve these division problems by dividing by 5.

$$
\frac{30}{5} = 6
$$
The quotient is $\boxed{6}$.

$$
\frac{55}{5} = 11
$$
The quotient is $\boxed{11}$.

$$
\frac{20}{5} = 4
$$
The quotient is $\boxed{4}$.

$$
\frac{75}{5} = 15
$$
The quotient is $\boxed{15}$.

$$
\frac{90}{5} = 18
$$
The quotient is $\boxed{18}$.

$$
\frac{20}{5} = 4
$$
The quotient is $\boxed{4}$.

$$
\frac{45}{5} = 9
$$
The quotient is $\boxed{9}$.

$$
\frac{25}{5} = 5
$$
The quotient is $\boxed{5}$.

$$
\frac{60}{5} = 12
$$
The quotient is $\boxed{12}$.