78. The crown weighs 60 min and consists of an alloy of gold, copper, tin, and iron. Gold and copper make up $\frac{2}{3}$ of the mixture, gold and tin $\frac{3}{4}$, and gold and iron $\frac{3}{5}$ of the total weight. Determine the weight of each metal separately.

2 Problems from a collection of problems.

## Epigrams.

Problems in verse from the "Anthologia Graeca".
78. Gold and copper make 40 minae, gold and tin 45, gold and iron 36. If added together, the triple amount of gold, tin, copper, and iron makes 121 minae. Therefore, double the amount of gold equals 61 minae and the ordinary amount 30.5 minae. Then it is easy to find that copper was 9.5 minae, tin 14.5 minae, and iron 5.5 minae.

The Greek Anthology - “Anthologia Graeca” - an arithmetic collection containing 48 problems, the conditions of which are written in verse form. In the 10th-14th centuries, they were very popular and serve as a prototype for “Récréations mathématiques.”