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。0 Y8 m6 U$ ^6 z7 Q) |: A! i
weight any 2 sets.公仔箱論壇* g" X, @7 Q' l
if the 2 sets are equal, then you know the heavy one is in the thirdtvb now,tvbnow,bttvb4 ^+ \6 s' L- `. V- x
if one of the 2 is heavier, then the heavy one is in that set
) h ]) h6 {! ~/ ^# J+ ?then divide the 4 balls into 2.
) B& M8 m% @$ Xweigh themwww3.tvboxnow.com5 _3 N% `/ F# N. T5 @) T5 Y% R
and divide the heavier into 1
* {# I _6 h; {7 H! z$ ETVBNOW 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 weight them.公仔箱論壇0 ]1 @% ]4 H! s# A7 b! V
3 x weighing and get the ans. , [/ @/ G. p2 B0 t
in less than 15 secs. |