A man rode into a town on Friday.He stayed three nights and than left on Friday.How come?

问题描述:

A man rode into a town on Friday.He stayed three nights and than left on Friday.How come?
请写出思路哈.

一个人在星期五驱车去一个城市,他在那里待了三个晚上,然后在星期五离开.
也就是他在路上用了4天(五、六、日、一),星期二到,待3个晚上(二、三、四),星期五离开.
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