一、原题呈现《挑战智慧》上有这样一道趣味数学题:暑假的一天,小明一家到“新华游乐园”游玩.当他们经过游乐园门口的商店时,看见商店贴有告示:“矿泉水每瓶1元,每三个这样的空瓶可以换一瓶矿泉水.正巧有一群小朋友来买矿泉水.作为数学老师的爸爸灵机一动,想考考小明.于是爸爸问小明:”假如这群小朋友刚好有12元钱,最多可以喝几瓶矿泉水?“ First, the original title presented ”Challenge of Wisdom“ has such a fun math problem: On the summer vacation day, Xiaoming’s family went to the ”Xinhua Amusement Park“ to play. When they passed through the shops at the entrance to the amusement park, they saw the store’s notice: ”Mineral water costs 1 yuan per bottle. Every three such empty bottles can be used for a bottle of mineral water. It happened to have a group of children to buy mineral water. As a math teacher’s dad, the dad took a test and tried to test Xiaoming. So Dad asked Xiao Ming: “If these children have just 12 yuan, can they drink up to a few bottles of mineral water?”