《孙子算经》是我国最古老的三部数学名著(即《周髀算经》、《九章算术》、《孙子算经》之一,其中“物不知其数”所作的是世界上公认的古老的重要贡献.原文如下: “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?” 用现代数学语言表述,该问题就是:求自然数n,使得 The “Sun Tzu Classic” is one of the oldest three mathematics masterpieces in China (ie, “The Zhouyi Classics”, “The Nine Chapters of Arithmetic”, and “The Grandson’s Classics”. Among them, “Nothing is known” is recognized by the world. The ancient important contribution. The original is as follows: “There are things that are unknown, the number of three or three numbers is two, the number of five or five is three, and the number of seven or seven is the second. What is the geometry of the object?” Expressed in modern mathematics, The problem is: find the natural number n, so that