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.$ N) h6 C! `7 l9 p
- 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.8 t: A% z+ i" N" i4 c
www2.tvboxnow.com# z$ J4 L$ e7 D# i7 Y
中间那个说我也不知道我戴什么颜色帽子.
) l" U' J, I8 {: c; R3 ]www2.tvboxnow.com- 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: n. J0 V' y& N4 N O4 H* G8 ?9 s3 e
0 a" A' L- k- _' J但是第一个说我知道我戴什么颜色帽子.; {) P# ]# O- \+ T; `
- #1 must be wearing RED |
發表於 2008-12-3 10:06 AM
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