There is 12 balls.. divide them into piles of 4tvb now,tvbnow,bttvb0 O+ t" o) y* r# @, L. P
so 3 groups for 4..name is A,B,C公仔箱論壇, `" F1 ]0 F$ ~+ }9 Z) k7 _
case 1: / |+ J' Q/ P, c- c
measure A -- B
4 [3 C6 @9 e9 c1 L# `tvb now,tvbnow,bttvbA or B is heavier tvb now,tvbnow,bttvb# A1 l: d9 c r
divide that group into 2 by 25 y# u6 [3 i1 \4 ^4 C- S
then divide heavier group into 1 by 1
8 z# {$ k, T0 N' HTVBNOW 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。8 K3 f" N4 M' [6 f5 Y" v Q' Q7 s0 s
case 2:公仔箱論壇) M7 b4 I6 W6 D2 ^% e5 v5 G
A and B is the same.. therefore C has the heavier ball
0 W$ b; L4 i. g* W; @divide C into 2 by 2
0 T/ h3 V6 q/ K- h- R' c1 m公仔箱論壇then divide heavier group into 1 by 1..
) Q. h- l8 @9 l9 c+ t, G
) _* D# T# |4 W5 MTVBNOW 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。got it in 30 seconds.. not so hard -.-' |
發表於 2007-3-27 01:35 AM
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一知道有答案睇就唔想谂咁耐了
