[外语] 用英语做数学趣味题

1楼ANGELA12 ANGELA12 (天心月圆) 发表于 2009-5-31 16:56 显示全部帖子

thank.

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2楼ANGELA12 ANGELA12 (天心月圆) 发表于 2009-5-31 21:00 显示全部帖子

引用:

原帖由 H爸于 2009-5-31 17:08 发表 $\"\"$
光讲thank？通吗？

呵呵　ＴＨＡＮＫＳ.

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3楼ANGELA12 ANGELA12 (天心月圆) 发表于 2009-5-31 21:17 显示全部帖子

Sue invited 4 friends to go with her to the movies;There are 120 different ways in which they can sit together in a row.In how many of those ways is Sue siting in the middle?.

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