返回列表 发帖

请教这道题

39,小于500的正整数中,被7除余1 ,且被3除余2的数有多少?
收藏 分享

it is so easy to solve this question:

1, find the both initial numbers, such as for 7a+1, and 3b+2,...8 is the first number you need to have.
2. since 7 and 3 are prime numbers, so 3*7=21 is the different in such number list, so then you can solve this. Hope hlpes

TOP

Thanks a lot

TOP

返回列表

站长推荐 关闭


美国top10 MBA VIP申请服务

自2003年开始提供 MBA 申请服务以来,保持着90% 以上的成功率,其中Top10 MBA服务成功率更是高达95%


查看