Jane's age is 's age is a prime number.Andy's age has 8 factors a_英语解答

Jane's age is 's age is a prime number.Andy's age has 8 factors and he is one year older than Jane.Find the sum of their age?

人气：274 ℃　时间：2020-02-04 08:01:33

解答

Jane的年龄是一个质数（素数） ,andy的年龄有8个因子并且他比jane大一岁
求他们年龄的和
有8个因子的数,24是这样一个数它的因子分别为1,2,3,4,6,8,12,24
而且24少一个23 是一个质数,刚好符合
所以它们的和是23+24 = 47