Divide 3 groups first.
' I' O( R% e+ _: v8 e5 ]5.39.217.76i.e. 4 x 4 x 4.
* n" H. d! W, F b+ x7 FWeight any 2 groups [1st]5.39.217.76+ h4 G( ^9 x8 e7 j
then you will know the heavier ball in which group.
* V- Y6 @7 p& |5.39.217.76Weight any 2 balls in that group [2nd]
# D# d8 j! Q2 Otvb now,tvbnow,bttvbthen you will know the heavier ball in which 2 balls.
+ V- T5 i X" a" cRepeat again in remainders [3rd]
/ P" P% |7 R6 z9 S6 l公仔箱論壇Got the heavier ball. |
發表於 2009-7-2 12:48 PM
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