There is 12 balls.. divide them into piles of 4tvb now,tvbnow,bttvb) t9 C5 G: a2 o+ t- E# I/ V9 T7 ?
so 3 groups for 4..name is A,B,C
7 g- ^* A: p6 h+ B- O3 d! Ycase 1:
Y9 M3 ]1 t: O& L! s- itvb now,tvbnow,bttvbmeasure A -- B 5.39.217.76& w# H: P" M) _- m
A or B is heavier
N5 r2 H: ], J% g Z4 Qdivide that group into 2 by 2TVBNOW 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 |+ t" |* c/ _5 n" J5 o
then divide heavier group into 1 by 1TVBNOW 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。: }, n4 v$ B2 }- \/ Z
; P; ~, Y5 X2 rcase 2:
4 y/ O& M8 n& D$ [8 @. \A and B is the same.. therefore C has the heavier ball
) ~# j8 w7 d, R1 Gdivide C into 2 by 2
8 t' ^4 A- h8 ]then divide heavier group into 1 by 1..# {7 D' K2 P9 m" @ D: F
, R( f: }, g% [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
