V2:One book has 100 pages, one way - the first page stick blue sticker, and every six pages stick the blue stickers. The other way – first stick red sticker, then every 8pages stick red ones. Q- how many pages with out stickers?Answer choice..68, 70, 72,75….
(原文:A: total pages – number of sequences + pages have two stickers.
V3:一个笔记本100页,the owner在第一页上贴了一个红色的便签和一个蓝色的便签,之后每六页贴一个红色的便签(原题说的是every sixth page 我不确定是之后每隔六页在下一页贴一个,还是每六页中的最后一页贴一个……不过按两种情况算,最后答案都是一样的),每八页贴一个蓝色的便签(every 8th page),问这个笔记本上没有便签的页数。先把有红色便签和有蓝色便签的页数分别求出来再减去重复的~作者: dumengxuan 时间: 2012-4-20 07:13