divde the 12 balls into 3 sets of 4.
V+ X2 m& {, C! G+ b9 J- h0 twww3.tvboxnow.comweight any 2 sets.tvb now,tvbnow,bttvb; X4 Z! I( e, j. c+ K
if the 2 sets are equal, then you know the heavy one is in the third0 i* x+ X$ j: S2 |
if one of the 2 is heavier, then the heavy one is in that set5 T, ^4 Y* |! p$ \
then divide the 4 balls into 2.
$ E* ]$ z4 F! \4 ?, V4 @ X7 Bwww3.tvboxnow.comweigh them
9 u. e' g" ^" ~1 q1 E公仔箱論壇and divide the heavier into 1
3 _, l: Y' z4 A1 atvb now,tvbnow,bttvband weight them.
% E6 Z+ N. l4 i# S O公仔箱論壇3 x weighing and get the ans.
; M3 G2 V# s/ k' Y/ N0 S$ Tin less than 15 secs. |