Divide 3 groups first.公仔箱論壇% f: K1 P Q2 [) u. W
i.e. 4 x 4 x 4.
1 f* I7 w" M9 ^' ~Weight any 2 groups [1st]
9 m; h/ i7 F5 T8 x7 T- Mthen you will know the heavier ball in which group.
8 I) i" B& ~: wWeight any 2 balls in that group [2nd]
]& A. [) d0 a Q2 wtvb now,tvbnow,bttvbthen you will know the heavier ball in which 2 balls.
1 @# h# p5 ^* v( iRepeat again in remainders [3rd]5.39.217.76) s. Y. y& E: Q
Got the heavier ball. |
發表於 2009-7-2 12:48 PM
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