A3 For which values of the natural number $n$ is the value of the expression $\frac{n}{60}$ between $\frac{1}{6}$ and $\frac{1}{5}$?
(A) 10
(B) 11
(C) 12
(D) 1
(E) 14
A3. The fractions $\frac{1}{6}$ and $\frac{1}{5}$ are expanded to a common denominator. We get $\frac{10}{60}$ and $\frac{12}{60}$. The fraction that lies between them is $\frac{11}{60}$. Thus, the sought natural number is 11.