divde the 12 balls into 3 sets of 4.
( P: | O7 K1 ^5 z) e/ ktvb now,tvbnow,bttvbweight any 2 sets.
4 G4 P( W# P4 Q公仔箱論壇if the 2 sets are equal, then you know the heavy one is in the third
( k$ ^0 v; p9 [' Gif one of the 2 is heavier, then the heavy one is in that set
! P3 ]6 f( v- ^" B( ]6 d, itvb now,tvbnow,bttvbthen divide the 4 balls into 2.
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and divide the heavier into 1 I, L/ {% \; t5 ~$ Z
and weight them.
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