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Divide 3 groups first.
* O  H0 h8 e3 M9 M5 z8 ?i.e. 4 x 4 x 4.
: s  V/ U' K  [& M, V; H  S4 PWeight any 2 groups [1st]5.39.217.77:8898( N8 ~/ A) i7 C" |( T( k9 t  s2 ~9 t
then you will know the heavier ball in which group.
' d3 r" k7 u$ S3 t) ^& ]1 WWeight any 2 balls in that group [2nd]
9 R0 C3 F9 f7 B! j3 z5.39.217.77:8898then you will know the heavier ball in which 2 balls.5.39.217.77:8898: A2 @& `) |3 }; _( g$ W
Repeat again in remainders [3rd]
" L; L* l( }: F& ^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。Got the heavier ball.