There is 12 balls.. divide them into piles of 4
) Y6 H$ a* l( j& l2 P' @. t# Y* ]tvb now,tvbnow,bttvbso 3 groups for 4..name is A,B,C公仔箱論壇7 @: v9 g; e: f3 ?% u G$ y
case 1: & P4 g* ^2 Q3 H, F
measure A -- B tvb now,tvbnow,bttvb$ |% M5 V+ W5 I* P/ C o- E d3 a: k
A or B is heavier
+ R1 v2 v7 }- p+ E+ Z8 Z ?" O' i, WTVBNOW 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。divide that group into 2 by 2公仔箱論壇0 L, @; o5 u/ f- u0 q" Q! {3 H- W
then divide heavier group into 1 by 1
4 \/ F4 j. r4 c0 y* T2 D' X
. u6 o0 x2 t: t0 E' a: \tvb now,tvbnow,bttvbcase 2:
q, y" u8 e* yA and B is the same.. therefore C has the heavier ball
+ J: z0 z0 C9 O" U0 `9 o9 I2 H3 otvb now,tvbnow,bttvbdivide C into 2 by 2
f% k3 h" }9 g' f5 Nthen divide heavier group into 1 by 1..
# U. ]- `& B) G$ r+ D, t8 ?% Vtvb now,tvbnow,bttvb& E8 k2 l4 X% w* i
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
