divde the 12 balls into 3 sets of 4.
& A. q7 P/ I7 U8 l K$ \tvb now,tvbnow,bttvbweight any 2 sets.tvb now,tvbnow,bttvb3 F+ g; Z7 R/ Y" o' [6 h
if the 2 sets are equal, then you know the heavy one is in the third
. f7 d8 }) J. Q8 {/ R' `tvb now,tvbnow,bttvbif one of the 2 is heavier, then the heavy one is in that set
5 r& }) M5 Q; f, a6 ]' H N- R公仔箱論壇then divide the 4 balls into 2.
1 i( w. i3 d3 `weigh them
+ ?& K0 f! D9 R4 Y* cand divide the heavier into 1
- g. ]# `7 j5 p3 n+ w g7 K, _tvb now,tvbnow,bttvband weight them.
" ?2 J' J/ m4 |" m' o; Htvb now,tvbnow,bttvb3 x weighing and get the ans.
, }+ N" C$ G, g# m( \# t8 R+ m% qwww.tvboxnow.comin less than 15 secs. |