在17世纪,俄罗斯的数学家的手稿里,有一些有趣的例题和习题。下面是其中的一个问题。某人雇用四个木匠造一所房屋。第一个木匠说:“如果我一个人造,需时一年。”第二个木匠说:“要是我一个人造,需两年时间。”第三个木匠说:“要是我一个人造,非三年时间不可。”第四个木匠说:“要是我一个人造,没有四年是不 In the seventeenth century, the Russian mathematician’s manuscript contained some interesting examples and exercises. Here’s one of them. Someone hired four carpenters to build a house. The first carpenter said: ”If I were a man, it would take a year.“ The second carpenter said: ”If I were a man, it would take two years.“ The third carpenter said: ”If I A man-made, non-three-year time. “The fourth carpenter said: ” If I am a man, no four years is not