abcnow

三个红色和两个黑色tvb now,tvbnow,bttvb1 c" p/ ?! h7 f0 s3 z( H6 H# S% ]
tvb now,tvbnow,bttvb. _/ r1 `$ n- u$ C8 l
最后那个说我不知道我戴什么颜色帽子.公仔箱論壇, V6 H' W* F; J! V
- 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.5.39.217.76/ ^% B3 I( Z1 M2 K, v7 x

6 m. c: c& o0 V; F. @; U中间那个说我也不知道我戴什么颜色帽子.$ j+ L, f/ L- v1 |* A5 n
- 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.公仔箱論壇8 Z% F3 E, X! S% S. z0 q  n
公仔箱論壇3 D2 c) x9 F0 ]5 D: e
但是第一个说我知道我戴什么颜色帽子.+ Y- }, @: ^1 C: R7 I" T
- #1 must be wearing RED