Two vendors are selling apples at the market. Each has 30 apples; one sells three apples for two kreuzers, the other two apples for two kreuzers. After selling the apples, the first vendor asks the other for 30 kreuzers of revenue and says to him: Today we sold 60 apples and earned 50 kreuzers. Tomorrow I will give you 30 apples; if you also add 30 and again sell 5 for 4 kreuzers, then you will earn as much as we did together today, and my debt will be settled. The vendor indeed sold the 60 apples the next day, but only earned 48 kreuzers. Where does the two kreuzers difference come from?
On the first day, they got an average of $\frac{5}{6}$ krt for an apple, and on the second day, $\frac{4}{5}$ krt, so $60\left(\frac{5}{6}-\frac{4}{5}\right)=2$ krt cheaper for the 60 apples.

Number of solutions 33.