Divide 3 groups first.公仔箱論壇( y7 S; ]4 G7 n. R
i.e. 4 x 4 x 4.
7 I5 x0 K1 E: |. C% ftvb now,tvbnow,bttvbWeight any 2 groups [1st]tvb now,tvbnow,bttvb- w, Q$ T# a4 H# `% k; t
then you will know the heavier ball in which group.公仔箱論壇1 G7 K7 h5 O3 {# R+ u
Weight any 2 balls in that group [2nd]
% l, J! w7 i0 U- d公仔箱論壇then you will know the heavier ball in which 2 balls.5.39.217.766 K2 ?& i, G. b* {) G; U& X, j
Repeat again in remainders [3rd]公仔箱論壇% z! e/ i3 c9 B5 l# U
Got the heavier ball. |
發表於 2009-7-2 12:48 PM
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