14. (6 points) Xiaoli did a Hope Cup practice paper. In the first hour, she completed $\frac{1}{5}$ of the total. In the second hour, she completed $\frac{1}{4}$ of the remaining. In the third hour, she completed $\frac{1}{3}$ of the remaining. At this point, 24 questions were left undone. Therefore, the practice paper had $\qquad$ questions in total.