新足迹 › 论坛 › 澳洲生活区 › 子女教育 › 小学教育 › 有一题求助!谢谢

精华好帖回顾
· 老陶一天的上海菜（晚餐已加） (2010-10-4) 老陶	· 人生第一次遭遇手机的回忆 (2007-9-12) 安远翔
· 蜜汁金沙骨 (2010-7-20) chesecake	· 清新的感觉--西柚芒果冻芝士 (2008-1-23) cctang

查看: 3631|回复: 2

有一题求助!谢谢 [复制链接]

bill-bill

布鞋族

发表于 2015-10-7 21:17 |显示全部楼层

此文章由 bill-bill 原创或转贴，不代表本站立场和观点，版权归 oursteps.com.au 和作者 bill-bill 所有！转贴必须注明作者、出处和本声明，并保持内容完整

We had to design a colour code for all the books in our class library. We decided to have 4 stripes on each book, like this : we could colour each stripe in one of six colours.
It didn't matter if more than stripe had the same colour, not even if they were adjacent. But we couldn't have all the stripes the same colour. How many different books could we code in this ways?