著名数学家华罗庚在他家乡金坛中学读初中时,老师在课堂上提出了“孙子算经”中的一道有名算题:“今有物不知其数,三三数之剩二,五五数之剩三,七七数之剩二,问物几何?”话音刚落,他就脱口而出:“二十三!”为什么能这样似乎不假思索就迅速而准确地说出答案呢?当时他是这样想的:“三二数之剩二,七七数之剩二, The famous mathematician Hua Luogeng in his hometown of Jintan junior high school, the teacher put forward in the class ”Sun Tzujingjing “ in a famous title: ”This thing I do not know the number of the remaining three or three, He left blurted out: “Twenty-three!” Why can we say so quickly and accurately without any thinking? At that time he was thinking like this: "The remaining two of thirty-two, the remaining seven seven,