## 125. Math Puzzle 10/75

"What time is it?" Marie-Luise was asked. She jokingly replies: "Until the end of the day, twice two fifths of what has already elapsed since its beginning remain." What time was it at that moment?
The day has 1440 minutes. Twice two fifths, four fifths, have elapsed since the beginning of the day. If $x$ is the number of minutes that have elapsed since midnight, then:

$$
x+\frac{4}{5}=1440 \quad, \quad x=800
$$

800 minutes have elapsed since the start of the day. It is 13:20.