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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tvboxnow.com0 N$ B3 x4 E: C- L' g% E
共四堆
$ W, c/ T8 f8 d: etvb now,tvbnow,bttvb称两次得出异常的在那一堆,其轻重tvb now,tvbnow,bttvb. f6 }) |' V$ J; i9 R6 _' F
在异常的那一堆中在称一次
" j! P  k* M7 s: j  S就可以找到了
divde the 12 balls into 3 sets of 4. 公仔箱論壇  o8 g% @$ \' b* w
weight any 2 sets.
+ W7 S% T* p' x+ L3 y% Ttvboxnow.comif the 2 sets are equal, then you know the heavy one is in the third
* S9 w6 o& F7 I6 Y  z: J; Eif one of the 2 is heavier, then the heavy one is in that set1 X5 n, l1 d2 K( K+ ?, i
then divide the 4 balls into 2.公仔箱論壇1 ^7 Q! n7 A3 v; F; I- f
weigh them
! w% @! P$ [2 h; f; n6 Pand divide the heavier into 1
8 |2 Q9 J& O7 C# v& b2 [/ `7 m4 ^tvb now,tvbnow,bttvband weight them.tvb now,tvbnow,bttvb) i, w0 R1 V) Z8 q2 ]/ C
3 x weighing and get the ans.  " \$ S. u. }& [! Q% @( i
in less than 15 secs.
1. 6 aside and weight.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。- W4 |+ i% }/ E1 d# V0 |+ E
2. heavier side from (1), 3 aside weight again.% ~8 z% n" i; ?. |" q
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. tvb now,tvbnow,bttvb; V/ E' `9 X3 F3 M
公仔箱論壇  J6 ?( q% O3 W0 [* v( m& r. o
but i have a question. 重量異常 can be heavier or lighter.... so......
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