divde the 12 balls into 3 sets of 4. tvb now,tvbnow,bttvb* k$ [, \: y3 I: D) ?# e v
weight any 2 sets.公仔箱論壇$ c* P; m% u" b2 ?' |0 K
if the 2 sets are equal, then you know the heavy one is in the third
# R( w0 ]% u, 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 set4 d2 r+ C5 g* X. k$ D& f
then divide the 4 balls into 2.tvb now,tvbnow,bttvb1 V' `8 E# y8 L+ u: _ b' K
weigh them
/ ?& K+ b T0 Q9 vand divide the heavier into 1tvb now,tvbnow,bttvb% M4 l- d8 `- j
and weight them.公仔箱論壇# p9 S% E; S. A) |
3 x weighing and get the ans.
* s7 ^5 i1 K2 D0 ]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。in less than 15 secs. |