三个红色和两个黑色
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最后那个说我不知道我戴什么颜色帽子.
5 ^9 k5 s/ c% m, Atvb now,tvbnow,bttvb- the front #1 , #2 must not be black/black. Otherwise, #3 will know he is red. #1/#2 must be red/red or red/black or black/red.5.39.217.77:8898( B. C; W* ^% _
tvb now,tvbnow,bttvb1 B" x0 J0 _3 b$ A: N+ f& u$ I
中间那个说我也不知道我戴什么颜色帽子.5.39.217.77:8898' c" c' C7 r9 w7 l+ b; `
- for #2, if he see #1 wearing black, he can be sure he is red. since #2 cannot be sure, then #1 must NOT be wearing black.tvb now,tvbnow,bttvb% u6 C: b0 u" P% F5 O
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但是第一个说我知道我戴什么颜色帽子.5.39.217.77:8898' P( [" o8 W* t8 B
- #1 must be wearing RED |
發表於 2008-12-3 10:06 AM
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