2. 职称英语
  3. I have a horse.Do you know what color it is? Tom said, "I guess it is not black.

I have a horse.Do you know what color it is? Tom said, "I guess it is not black.

游客2024-08-14  0
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?
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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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