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Divide 3 groups first.5.39.217.77! r& b" K# u+ \( f
i.e. 4 x 4 x 4.TVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。/ u% B0 n  Z% X/ N! d3 p
Weight any 2 groups [1st]
# n/ M5 t5 e# |5 W, F7 U7 |) A6 gthen you will know the heavier ball in which group.
( n% g; @$ |4 w, |# O6 ttvb now,tvbnow,bttvbWeight any 2 balls in that group [2nd]' x+ K% @6 X, x: k) ^) M- b& P
then you will know the heavier ball in which 2 balls.公仔箱論壇6 U# s. t+ |  ?2 [0 `
Repeat again in remainders [3rd]tvb now,tvbnow,bttvb; l) u2 [7 m% V3 \5 B9 U, F( [
Got the heavier ball.