The title is the real question of the 2008 national civil service examination, but there are mistakes in the exchange and learning process, which leads to public confusion. If you follow the landlord's question, there is no answer at all. It can be seen how important accurate communication is!

The original question was: "A comes every five days, B comes every 1 1 day, C comes every 17 days, and D comes every 29 days". Going once every five days is totally different from going once every five days!

Once every five days is once every six days, so the next meeting is after the least common multiple of 6, 12, 18, 30, that is, 180 days. Where May, July, August, 65438+1October is 3 1 day, and June and September are 30 days, so after 180 days, it is165438+1October/kloc-0.