divde the 12 balls into 3 sets of 4.
$ U: K) T, ~0 {6 \www3.tvboxnow.comweight any 2 sets.公仔箱論壇+ `! }( j7 D `* L2 z2 A: b
if the 2 sets are equal, then you know the heavy one is in the third
5 z+ `$ }9 }% \- y2 b/ rif one of the 2 is heavier, then the heavy one is in that settvb now,tvbnow,bttvb6 F% ]! X5 W! z" U
then divide the 4 balls into 2.
9 z4 z+ y2 o6 ? R. \2 n9 o3 M# x公仔箱論壇weigh them9 ?9 j* n* W' `- J! E! W8 n
and divide the heavier into 1tvb now,tvbnow,bttvb, i4 W& T0 f6 [( A7 M/ R; i- U2 ^
and weight them.www3.tvboxnow.com4 D( C& ~6 ~- [( I
3 x weighing and get the ans. 1 L& t$ r* F6 E4 s2 _+ A/ O
in less than 15 secs. |