Divide 3 groups first.
9 x, d' W: b8 Q/ h/ i( c0 I7 N* c5.39.217.77:8898i.e. 4 x 4 x 4.
- l: n4 C% b2 F2 e8 D5.39.217.77:8898Weight any 2 groups [1st]& t( J" a$ O$ V
then you will know the heavier ball in which group.tvb now,tvbnow,bttvb' i3 r u" U1 t+ \
Weight any 2 balls in that group [2nd]tvb now,tvbnow,bttvb: t) r8 ^' X( k7 V$ ^, X
then you will know the heavier ball in which 2 balls.5.39.217.77:88988 c& c1 _. N- t' y9 S. U/ b
Repeat again in remainders [3rd]* Y- B$ j( G* f* z2 s5 x( Z
Got the heavier ball. |
發表於 2009-7-2 12:48 PM
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