divde the 12 balls into 3 sets of 4. 公仔箱論壇% i' v/ ]1 t1 X9 ]# j3 B" ^! S
weight any 2 sets.
7 e, H7 I6 \0 _7 r( ^6 x0 X& g2 g. Ctvb now,tvbnow,bttvbif the 2 sets are equal, then you know the heavy one is in the third
7 V" o, e1 S6 M0 zTVBNOW 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 one of the 2 is heavier, then the heavy one is in that setTVBNOW 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。; ]0 o# S0 l$ N% e* J" Q; x1 ?; b
then divide the 4 balls into 2.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。5 C) ]* F( j/ y3 w6 M3 B$ j: i
weigh them
8 s( e0 I& x8 z& ]+ t$ S P公仔箱論壇and divide the heavier into 1
( I3 ?1 p( q7 w9 T' R' gand weight them.
% c4 X( [% U$ R8 K& L$ F3 x weighing and get the ans.
3 n7 u+ A$ j/ w5 G8 din less than 15 secs. |