divde the 12 balls into 3 sets of 4.
1 z% B1 f5 O7 J4 X' a6 Lweight any 2 sets.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。9 A% ^, m0 D" a
if the 2 sets are equal, then you know the heavy one is in the third
" s( g# M3 f$ 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 settvb now,tvbnow,bttvb" g0 E( f: w2 _* Y e5 F2 _7 r
then divide the 4 balls into 2.公仔箱論壇 a. F5 i" R7 H2 h' d5 z" X5 y
weigh them
/ K. l! A4 U% o) e9 k, ^8 Rand divide the heavier into 1
, E* f* Q8 w5 `- o# k. b" O4 ~6 Q公仔箱論壇and weight them.tvb now,tvbnow,bttvb2 i* j, m% Y" O+ r* N+ }. b
3 x weighing and get the ans. 公仔箱論壇' g/ L) N" {9 b# S$ x0 T
in less than 15 secs. |