How many positive integers less than 1000 are multiples of 5 and are equal to 3 times an even integer?
问题描述：
How many positive integers less than 1000 are multiples of 5 and are equal to 3 times an even integer?
答
Answer：30
小于1000的正整数是5的倍数又是3乘以一个偶数
也就是就是5的倍数又是6的倍数,用1000/(5*6)=30……10
也就说有30个正确答案33好吧，真对不起啦，我是新高一，最近也刚学这些词，理解有误请见谅。额没事没事