There is 12 balls.. divide them into piles of 4
0 N. j7 r8 y$ C0 {3 j* h, uso 3 groups for 4..name is A,B,C
! b* h* l7 K( r公仔箱論壇case 1:
4 ?6 G5 ]- F3 ~8 m4 \公仔箱論壇measure A -- B
) j3 e/ U' A' q4 j0 a* S- ^! n3 r1 fA or B is heavier 5.39.217.76# q8 K0 h# e$ F( T8 M
divide that group into 2 by 2
/ ]% _9 s4 D; V% A4 T, D4 Itvb now,tvbnow,bttvbthen divide heavier group into 1 by 1公仔箱論壇! b- p5 J: f4 b! u6 H+ P% }
0 J8 h* ]2 E3 G- CTVBNOW 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。case 2:
! ?1 s) l) \% t$ s+ w% n. {A and B is the same.. therefore C has the heavier ball% n7 C7 Q+ s2 |6 M" z S
divide C into 2 by 2
# Q V" i3 J7 l3 @( Z: n& I, s: W( E7 uthen divide heavier group into 1 by 1..
% L+ O8 m, {- @, |: i公仔箱論壇
+ I4 G2 {; P( K+ s+ ~1 ?. b& W7 \tvb now,tvbnow,bttvbgot 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
