divde the 12 balls into 3 sets of 4.
! y- @% m& w0 Nwww.tvboxnow.comweight any 2 sets.
+ N7 J+ E5 k" f% X* aTVBNOW 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。if the 2 sets are equal, then you know the heavy one is in the third
! e" ~$ o0 j0 P& x公仔箱論壇if one of the 2 is heavier, then the heavy one is in that set
i9 e" g9 a5 W4 Q& b3 z4 c' \0 uthen divide the 4 balls into 2.
" o4 Q }: l3 G2 m1 f' A* w( N7 bweigh themTVBNOW 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。) [' T8 ], h' Y; z+ T# I/ a7 W2 }
and divide the heavier into 1www.tvboxnow.com( A" M% H7 G$ F4 u" K; E
and weight them.
5 o! J& V' ?4 g1 O. K( S3 Z3 x weighing and get the ans.
- S2 n! U9 ^: y1 \in less than 15 secs. |