Divide 3 groups first./ N4 H* Y# T# s2 Q. H0 C, `4 s% p
i.e. 4 x 4 x 4.tvb now,tvbnow,bttvb2 Q0 S' r' r8 A4 X9 R: q
Weight any 2 groups [1st]
* V7 ?/ h( b! E. t. |. jthen you will know the heavier ball in which group.
* o! K$ w9 R% d3 _+ l) Vtvb now,tvbnow,bttvbWeight any 2 balls in that group [2nd]( B* ^6 |. o9 Z4 Y
then you will know the heavier ball in which 2 balls.
0 d% t& R$ }# v2 O' g1 ^tvb now,tvbnow,bttvbRepeat again in remainders [3rd]5.39.217.76* T& f& Z9 v" k6 k3 m) H
Got the heavier ball. |
發表於 2009-7-2 12:48 PM
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