Divide 3 groups first.
' O% r0 R( u+ ?# @) `) d& w8 b2 bi.e. 4 x 4 x 4.tvb now,tvbnow,bttvb+ I* Y4 K: a3 v9 z
Weight any 2 groups [1st]
a9 \: u* ]9 @" k: y3 cthen you will know the heavier ball in which group.! ?6 t7 a" w* e6 f* Y; r
Weight any 2 balls in that group [2nd]
2 v8 b: Y9 W( d/ v! S$ K! W1 gthen you will know the heavier ball in which 2 balls.
1 H3 I+ G1 g( b- Itvb now,tvbnow,bttvbRepeat again in remainders [3rd]tvb now,tvbnow,bttvb0 P/ f& L( C2 g% F( x# n1 ~# o# q
Got the heavier ball. |
發表於 2009-7-2 12:48 PM
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