Divide 3 groups first.
* ]) X3 N8 n3 H# s5 w9 C" _5 u6 {5.39.217.76i.e. 4 x 4 x 4.
E5 g* U F+ T1 j! ]1 k* ^$ t5.39.217.76Weight any 2 groups [1st]
$ ?; X' a8 B3 D5.39.217.76then you will know the heavier ball in which group.5.39.217.765 h" Q& R; K' z7 v( p0 o m
Weight any 2 balls in that group [2nd]
) z& _$ g( u# p4 athen you will know the heavier ball in which 2 balls.( ?1 m! v$ `/ t5 ~& _9 D
Repeat again in remainders [3rd]
G8 v, U1 Q( i5.39.217.76Got the heavier ball. |
發表於 2009-7-2 12:48 PM
| 
