选择十进制,显然与人类长有10个手指头有关。这一点亚里士多德早就注意到了。在《问题集》XV卷里,亚里士多德给出了人类采用十进制的各种可能的解释。其中有的与毕达哥拉斯有关,毕氏学派认为10是一个完美的数,并给它披上神秘的外衣。首先,10是最小的4种类型的数之和:1+2+3+4=10,其中1非素数也非合数,2是偶素数,3是奇素数,4是合数。另一种解释是1代表 Choosing decimals is obviously related to the fact that humans have 10 fingers on their heads. Aristotle had already noticed this point. In the Problem Set XV, Aristotle gives all possible explanations of human use of decimal. Some of them are related to Pythagoras, and the Pythagoreans consider the 10 to be a perfect number, with a mysterious coat on it. First, 10 is the sum of the smallest 4 types of numbers: 1 + 2 + 3 + 4 = 10, where 1 is not a prime number, 2 is an even prime number, 3 is an odd prime number and 4 is a composite number. Another explanation is 1 representative