lux1261

答案!!!!!!!!!答案!!!!!!!!!!!答案!!!!!!!!!!!!!1

lesley

^:)^ >:D<

leekh

thx

jc49

let cc

Special_Forces

not possible

sm911118

不知道要怎麼做阿??

laou

hao

jen198053

there got more simple way to do it, just read my way, the one i answered before

samkk123

the

hakis

see 了

jenfien

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

fxenon

how?

nyb

先分3个一堆
5 P6 b, c8 n; B4 ?+ P* I共四堆
+ ~4 y# b# z, [. J. m* W+ c称两次得出异常的在那一堆，其轻重
, o8 d3 Z: k% C3 U公仔箱論壇在异常的那一堆中在称一次
, P+ K3 M- r; \3 @0 x5.39.217.77:8898就可以找到了

ceteriz

divde the 12 balls into 3 sets of 4.
. }1 N, E4 y+ C1 p; J6 mweight any 2 sets.5.39.217.77:8898( R) m/ w# Y) f% x
if the 2 sets are equal, then you know the heavy one is in the third
1 ^4 {; H0 G- A' N  z6 e公仔箱論壇if one of the 2 is heavier, then the heavy one is in that set
6 u8 t& }; C, M- E5 P3 Pthen divide the 4 balls into 2.
/ e9 ~+ {) _4 p5 \weigh them- @! t4 Q" q7 `3 q; ?6 C, A1 u
and divide the heavier into 1" A+ ~+ {0 F4 d2 P
and weight them.
9 l, L3 q. w+ H9 z8 N, L( D+ Atvb now,tvbnow,bttvb3 x weighing and get the ans.  
2 P" V5 z( y! `1 Bin less than 15 secs.

kino_kino

1. 6 aside and weight.5.39.217.77:8898* u; ]% b! ?- r; H
2. heavier side from (1), 3 aside weight again.
3 _3 r1 ]  H! L+ e* _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.
2 j- D" f" f! \' A6 R( r  J
0 V4 c8 W3 e% x5 w( E5 Vbut i have a question. 重量異常 can be heavier or lighter.... so......