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答案!!!!!!!!!答案!!!!!!!!!!!答案!!!!!!!!!!!!!1
^:)^ >:D<
thx
let cc
not possible
不知道要怎麼做阿??
hao

the model answer is stupid

there got more simple way to do it, just read my way, the one i answered before
the
see 了
第一次,一边5个称,若质量没有异常就只称剩下的2个就知道异常的那个了;若有异常就把异常的那5个用一边2个称第二次,若没有异常就是剩下的那个异常了,若有异常就把异常的那2个再2一边1个称第三次就知道了
how?
先分3个一堆tvb now,tvbnow,bttvb; x7 H! M* `; `; `
共四堆tvb now,tvbnow,bttvb1 u% v6 W$ t4 \: W& F+ y( h- l
称两次得出异常的在那一堆,其轻重tvb now,tvbnow,bttvb  J: s/ L4 a! t: h
在异常的那一堆中在称一次; v4 B1 v  }, \+ F# p
就可以找到了
divde the 12 balls into 3 sets of 4.
  W7 C0 G. I) A1 f: A7 j2 atvboxnow.comweight any 2 sets.
( X- h6 n1 w  j  d0 dTVBNOW 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。if the 2 sets are equal, then you know the heavy one is in the thirdtvboxnow.com, Y# H7 ]8 r# I. }# Q- C
if one of the 2 is heavier, then the heavy one is in that set1 q9 _$ l: C1 V+ Y4 h9 [- O
then divide the 4 balls into 2.tvboxnow.com( m7 e: ^! q, a5 p$ z
weigh them& A$ S7 t! P/ I" D9 d
and divide the heavier into 1
1 _" z* k/ X: G' nTVBNOW 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。and weight them.
& O; V, T! }( u* E5 y6 Z8 w3 x weighing and get the ans.  
& k" z5 p2 |1 fin less than 15 secs.
1. 6 aside and weight., j1 ^' Z, J# C
2. heavier side from (1), 3 aside weight again.$ @! E- x1 l# F. y2 t6 X) `* \& b
3. heavier side from (2), take 2 out of 3 to weight. If equal weight the one not on the scale is the heavier one. else the heavier one on the scale is the odd one.
, T, |% e. }3 N
+ @0 }, |4 `% @  D公仔箱論壇but i have a question. 重量異常 can be heavier or lighter.... so......
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