If $\frac{n}{24}$ is a number between $\frac{1}{6}$ and $\frac{1}{4}$, who is $n$?
(a) 5
(b) 6
(c) 7
(d) 8
(e) 9
The correct option is (a).

Since $\frac{1}{6}=\frac{4}{24}$ and $\frac{1}{4}=\frac{6}{24}$, then $n$ can only be equal to 5.