Divide 3 groups first.
" \3 Q$ D( z/ F* ?# s3 w公仔箱論壇i.e. 4 x 4 x 4.
7 p1 F" q% p- i& OWeight any 2 groups [1st]
a! R: C9 T: k3 R( X, \. Z+ w gtvb now,tvbnow,bttvbthen you will know the heavier ball in which group.www2.tvboxnow.com. O a) T3 k% U
Weight any 2 balls in that group [2nd]9 {5 m9 R% L' ^3 r* T( u, ^. @* i4 ?
then you will know the heavier ball in which 2 balls.% b% |7 }; i7 ?! \$ f; z
Repeat again in remainders [3rd]
* |$ K3 L3 K$ k+ f1 O3 E9 g, YGot the heavier ball. |