ericchan1

好難呀．．．

eleven20

難...

jeffreyhohoyuan

好難呀．．．．

百事可乐

ddd

dimsum199

好難喎

PokChop

There is 12 balls.. divide them into piles of 4www3.tvboxnow.com9 E; C% l7 h/ A/ |4 q9 z7 A; F( |$ ]; d
so 3 groups for 4..name is A,B,C
5 ]/ `/ k" X& k' w* t, S! Ztvb now,tvbnow,bttvbcase 1: , }& i& T) Z; Y! D; ?) g  F4 ]1 j, h
measure A -- B " f2 h& `9 _$ J0 [! ~
A or B is heavier www3.tvboxnow.com* k# g( m5 E$ v1 L- u1 z; I
divide that group into 2 by 2
' R. Y+ [% k( Y' r4 S3 N; J0 [then divide heavier group into 1 by 1tvb now,tvbnow,bttvb1 G1 O! U. u: k% C! j6 A2 m! G. X

) w) s7 c8 H0 c. R% x3 R公仔箱論壇case 2:tvb now,tvbnow,bttvb) Q) P7 T9 Z3 o/ e( o- O8 B: r3 t0 B
A and B is the same.. therefore C has the heavier ballwww3.tvboxnow.com3 z' L1 P8 t, ]6 p% C* D2 l; n( G. W. J
divide C into 2 by 2
- d0 q0 Z2 K0 htvb now,tvbnow,bttvbthen divide heavier group into 1 by 1..
, s, \( v' ^/ g8 n5 }tvb now,tvbnow,bttvb
# Q; O' a' x. F# lwww3.tvboxnow.comgot it in 30 seconds.. not so hard -.-'

curlihead

thx

curlihead

i got it.... separate into 4 group 3(a)3(b)3(c)3(d), weight 2 of them(a,b), if it is the same, weigh b and c, if they are the same too... then the different ball must be in group d. if you weight different, you identify that group according to the different group. Also, we know the the different ball is heavier or lighter.
, i  {* s* @# |3 i4 o/ K: `
; L; ]  S# y& A' B9 \) etvb now,tvbnow,bttvbthey separate into 3 group111, weight 2 of them. if they are the same, the extra ball will be the different ball. if they are different, the heavier/ lighter ball will be the different one according to the previous weight.

boringaya

睇下先

mm_penguin

do this is so boring...4 \/ |3 G3 \# F/ j" b  I* V$ f- ]
play game la~~~

306247000

[-X OK la^:)^ ^:)^

diy123

一知道有答案睇就唔想谂咁耐了

hey8hey8

?

magcsm

why?

jackytan3344

多謝大大的分享