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我猜C, 因為他看的到B的顏色, 所以跟B一樣的顏色為只有1/3.
thanks for sharing
i think  is d
過了五分鐘也不知道,現在的小學生題見真難。
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C, because D didn't say anything.
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A... because he can see in the reflection from B's pupil of the colour of his hat.
C 因為D不知道 表示前面是一黑一
猜不出來,TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。* _; Y  d; M6 ?
d可能知道。
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D吧 如果係跟次序的話
不知道
不知道
It should be C.  If C's hat is white, then D should know D's is black.  However, D could not answer right away, then it mean D saw a white and a black in front of D.  C can conclude that his hat is black.
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