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Very simple problem
This problem for a second-class church parish school was invented by Leo Tolstoy. Who can solve it correctly only 30% of high school students, only 20% of university students and 10% of employees of banks and credit institutions. Every time I open the task and every time I forget the correct answer. From this, it is true, it only gets more interesting.
Seller sells a cap, which is 10 p. Good buyer, it measures and agree to take, but it has only 25 p. The seller sends the boy with these 25 p. to a neighbor, to exchange. Boy uses and gives 10 + 10 + 5. Seller pays cap and commissioning of 15 rubles. After a while the neighbor comes and says that 25 p. false calls to give her money. What to do? A man climbs to the cashier and returned her money.
Q: How much deceived seller?
Seller sells a cap, which is 10 p. Good buyer, it measures and agree to take, but it has only 25 p. The seller sends the boy with these 25 p. to a neighbor, to exchange. Boy uses and gives 10 + 10 + 5. Seller pays cap and commissioning of 15 rubles. After a while the neighbor comes and says that 25 p. false calls to give her money. What to do? A man climbs to the cashier and returned her money.
Q: How much deceived seller?
