432. Milk is poured into 30 glasses. A boy is trying to make the amount of milk equal in all glasses. For this, he takes any two glasses and pours milk from one to the other until the amount of milk in them is equal. Is it possible to pour milk into the glasses in such a way that the boy cannot achieve his goal, no matter how long he spends pouring?
432. Answer: it is possible. You need to pour 100 g of milk into all the glasses except one, and into the remaining one - 200 g

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