divde the 12 balls into 3 sets of 4.
2 @. I. j! Q6 O3 z: X$ N5.39.217.77weight any 2 sets.tvb now,tvbnow,bttvb; u" T1 _3 s1 }$ I
if the 2 sets are equal, then you know the heavy one is in the third
% v' G+ v. A4 Z1 S! D5 }; iTVBNOW 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 set
1 Q+ Y% F1 \( D$ ^' [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。then divide the 4 balls into 2.
: W* Z8 h' U; c' z2 M! |! Y9 S5.39.217.77weigh them
) M' e9 e* U2 ], O! @. b" r公仔箱論壇and divide the heavier into 1
! q# d" r4 U! i: ]5.39.217.77and weight them.公仔箱論壇7 J$ i$ x/ J- M0 I, Y4 s! @1 ]
3 x weighing and get the ans. ) ?4 |) w) Y+ N+ |+ D* I- J/ [3 T
in less than 15 secs. |