Divide 3 groups first.6 Y, g. }; M3 X' Q
i.e. 4 x 4 x 4.5.39.217.77- A; m9 p& B( x0 D$ q$ ^# n# S+ c8 B
Weight any 2 groups [1st]公仔箱論壇3 g! R2 H: _+ l' B9 z
then you will know the heavier ball in which group.
, X/ T5 [1 u* O! a6 iWeight any 2 balls in that group [2nd]5.39.217.77& J% ~: n3 P5 w2 P8 N6 i; ?% J
then you will know the heavier ball in which 2 balls.; j* l6 p3 A- F1 ?- o
Repeat again in remainders [3rd]9 l* A! k" u5 y3 C
Got the heavier ball. |
發表於 2009-7-2 12:48 PM
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