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tvb now,tvbnow,bttvb# e% w. H) _; d9 }! ]
共四堆
. T! M* F" A* @6 e$ a# i. L+ F3 {& R/ `称两次得出异常的在那一堆，其轻重( y4 X/ Z+ b! G
在异常的那一堆中在称一次
) k0 h0 Z4 a  a3 q, H$ i! y5 h公仔箱論壇就可以找到了

ceteriz

divde the 12 balls into 3 sets of 4.
2 [; ]4 i4 d2 V公仔箱論壇weight any 2 sets.  N6 u/ j9 l2 a; u% v6 g
if the 2 sets are equal, then you know the heavy one is in the third7 X+ G) w2 S0 s/ \, ~; u8 x7 ~
if one of the 2 is heavier, then the heavy one is in that set
7 h: @, L  J  f; r. J$ o+ Qos.tvboxnow.comthen divide the 4 balls into 2.( j" ?4 v1 _. E# B/ N( k
weigh them
" G! C  c2 H6 E% _& T9 f公仔箱論壇and divide the heavier into 1tvb now,tvbnow,bttvb8 x( @0 r# U, A  X: p
and weight them.
% K' J3 ~7 u. G3 x weighing and get the ans.  
( P- b; ?3 P) O3 @* L1 F" min less than 15 secs.

kino_kino

1. 6 aside and weight.
2 Z1 A" X" y/ j+ y0 P  E) _2. heavier side from (1), 3 aside weight again.公仔箱論壇4 n- C# ?0 L; S/ W" I3 A# G
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. - i: j8 X1 P: x; k9 j

! U$ A/ Y# I* D: J  U. Y7 Pbut i have a question. 重量異常 can be heavier or lighter.... so......