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I have a horse.Do you know what color it is? Tom said, "I guess it is not black." Brian said, "It is either brown or grey." Chri
I have a horse.Do you know what color it is? Tom said, "I guess it is not black." Brian said, "It is either brown or grey." Chri
admin
2021-03-06
3
问题
I have a horse.Do you know what color it is? Tom said, "I guess it is not black." Brian said, "It is either brown or grey." Chris said, "I know it is brown." I said, "At least one of you is right and at least one of you is wrong." What is the color of my horse if the color is one of the above?
选项
答案
The horse is grey.
解析
题目问我有一匹马,你知道它是什么颜色吗? Tom说“我猜它不是黑色”,Brian说“不是棕色就是灰色”,Chris说“我知道它是棕色”,我说“最少有一个人说的是对的,至少有一个人说的是错的”。如果颜色是以上的一种,我的马是什么颜色的?分析题目,因为主人说三个人至少有一个正确,至少有一个人错误。假设Chris说的话是正确的,那么三个人说的都正确,所以马不是棕色的;假设Tom说的话是错误的,也就是马是黑色的,那么三个人说的都错误,所以马不是黑色的;假设马是灰色的,那么Brain 和Tom说的话是正确的,Chris说的话是错误的,符合题目中主人的说法。因此,马是灰色的。
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本试题收录于:
C类竞赛(非英语专业本科)题库大学生英语竞赛(NECCS)分类
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C类竞赛(非英语专业本科)
大学生英语竞赛(NECCS)
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