4.1 Seven pirates were dividing five identical treasure chests. They agreed that five of them would take one chest each, while the others would receive a fair compensation equal to the value of a chest. Each of the recipients of a chest paid 10000 piastres into a common fund, after which the money was distributed among the remaining pirates. What was the value of one chest?
Answer: 35000

Solution. Two pirates received 50000 piastres, so each share amounted to 25000. Since the chests were divided fairly, the total amount of treasure was 25000 for each of the seven, totaling 175000. Then 175000 is the value of five chests, meaning each chest was valued at 35000 piastres.