divde the 12 balls into 3 sets of 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。5 U4 G% s7 O! ]3 h( N
weight any 2 sets.
+ j7 C: s. H |" h) @. i# m$ ytvb now,tvbnow,bttvbif the 2 sets are equal, then you know the heavy one is in the third
X) W3 F( M- b# O- Vtvb now,tvbnow,bttvbif one of the 2 is heavier, then the heavy one is in that set
" ^ }4 m1 Z- G. I$ f3 ~" I公仔箱論壇then divide the 4 balls into 2.
+ D8 z$ j% \/ C; qtvb now,tvbnow,bttvbweigh them
6 g! I/ b( ]& T% k; D6 CTVBNOW 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。and divide the heavier into 1
8 A( S" K6 I0 [" wtvb now,tvbnow,bttvband weight them.公仔箱論壇; z: `! f7 u! h
3 x weighing and get the ans. tvb now,tvbnow,bttvb% ?0 s5 I* A5 A# e/ m+ Q5 A- w
in less than 15 secs. |