Curry puff shop sells puffs at $0.80 each. Offer:Buy 3 get 4th half price. If customer has $50, how many puffs can he buy if he buys as many as he can.
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咖喱包题可以这样出:
赌场开张迎宾大减价,1个筹码买8毛,每买3个能半价买第4个。一个顾客有50块钱,问他买了几个筹码?
6 friends decided to rent computers from 2pm to 4.30pm. While 4 of them were playing, the other two would watch. If the cycle continues, and each of them played for equal number of minutes, how many minutes will each person get to play?
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