Divide 3 groups first.
3 h' W& W6 ?* m) d/ e b+ Ri.e. 4 x 4 x 4.
0 e% @# z& \0 ^0 ^2 gWeight any 2 groups [1st]
" G8 }3 t# W D7 v* Q m. v+ s- r5.39.217.77then you will know the heavier ball in which group.) `. E2 y/ K) t; f& C" X) L
Weight any 2 balls in that group [2nd]
4 @ D! S$ x( O# D: ftvb now,tvbnow,bttvbthen you will know the heavier ball in which 2 balls., i2 {8 E* O7 f% Y4 X
Repeat again in remainders [3rd]; D7 m7 E! Z; K K9 P" r
Got the heavier ball. |
發表於 2009-7-2 12:48 PM
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