Divide 3 groups first.5.39.217.76 t% J, y9 z7 O- j( i/ b
i.e. 4 x 4 x 4.
6 L! W' _; U2 _( x1 V1 MWeight any 2 groups [1st]
, L" K6 z9 R4 J! m5 p( ~公仔箱論壇then you will know the heavier ball in which group.
' A E! j& f( q5.39.217.76Weight any 2 balls in that group [2nd]3 R# g( d& T7 v! M9 l- k8 e4 {8 D
then you will know the heavier ball in which 2 balls.! Y, d5 m9 i1 b$ ?3 F) D
Repeat again in remainders [3rd]) l* J' E3 ]/ v3 T# k
Got the heavier ball. |
發表於 2009-7-2 12:48 PM
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