divde the 12 balls into 3 sets of 4.
, ^% y$ W0 h) E9 e* YTVBNOW 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。weight any 2 sets.
( `* z8 w F3 k: M公仔箱論壇if the 2 sets are equal, then you know the heavy one is in the third公仔箱論壇9 a4 c* N% N a6 z* Q
if one of the 2 is heavier, then the heavy one is in that set
8 d7 _$ t. n+ g, ^8 Ntvb now,tvbnow,bttvbthen divide the 4 balls into 2.tvb now,tvbnow,bttvb) X1 j8 P/ a9 h% T
weigh them
$ q- i. j6 E" g( p! P/ \and divide the heavier into 1* g5 O9 U( J# |- j
and weight them.
0 p* Y8 {# k9 K$ O5 f9 A8 x0 B公仔箱論壇3 x weighing and get the ans.
1 _& U+ o6 N, k K, Q( m" Ztvb now,tvbnow,bttvbin less than 15 secs. |