Divide 3 groups first.5 k2 s3 m/ j6 W9 ^/ ~* Q* u
i.e. 4 x 4 x 4.公仔箱論壇4 ?& ]7 `( s- h, Q
Weight any 2 groups [1st]2 U# S/ x5 r! Y3 o$ Z i' Q& Z
then you will know the heavier ball in which group.
0 W9 W. k9 H; F- p' R5.39.217.77:8898Weight any 2 balls in that group [2nd]
0 l5 }' N( r& d/ e3 ytvb now,tvbnow,bttvbthen you will know the heavier ball in which 2 balls.
, H- C8 n5 ^7 w% _- j! H8 ^" lRepeat again in remainders [3rd]
0 j- z* t \+ JGot the heavier ball. |
發表於 2009-7-2 12:48 PM
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