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Divide 3 groups first.tvb now,tvbnow,bttvb8 K- s2 R7 T2 D8 W" r7 m
i.e. 4 x 4 x 4.$ X( o8 `# F5 s# n8 X" r/ R. ?
Weight any 2 groups [1st]- |  k& p6 d* A9 o. c
then you will know the heavier ball in which group.
! `# M4 v: Q/ d8 {- b' cWeight any 2 balls in that group [2nd]. H- h2 R; ]5 l, x3 I" H* a( I
then you will know the heavier ball in which 2 balls.
' L- q* Q! u, BRepeat again in remainders [3rd]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。& u3 k  W' m& k4 ?8 z, j
Got the heavier ball.