Divide 3 groups first.
$ R$ ?+ j2 B; g/ ti.e. 4 x 4 x 4.
& _! w4 u# Q+ W3 B; x公仔箱論壇Weight any 2 groups [1st]
; U' C, M- N% C( Twww1.tvboxnow.comthen you will know the heavier ball in which group.www1.tvboxnow.com/ T4 @8 _1 @ N, ^9 Q0 H0 y
Weight any 2 balls in that group [2nd]www1.tvboxnow.com& `, y! h& o+ ?; f
then you will know the heavier ball in which 2 balls.
4 A- |9 ^$ k% u公仔箱論壇Repeat again in remainders [3rd]公仔箱論壇& }4 E- A, P- a, z3 C1 Z& K7 Q
Got the heavier ball. |