1986 AMC 8 第 9 题
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所有题目均经美国数学协会(MAA)官方合法授权使用。
9.
只沿图示路径和方向,从 到 有多少条不同路线?
Using only the paths and the directions shown, how many different routes are there from to
小提示:
按第一步分类列出路线:从 可以到 或
List the routes by the first step: from you can go to or to
大提示:
仔细沿箭头走;从 可以到 、 或直接到
Follow the arrows carefully; from you can reach or directly
解答:
沿箭头可行的路线是 、、、、 和 。共有六条。
所以正确答案是 E。
Following the arrows, the possible routes are and There are six of them.
Thus, the correct answer is E .
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