divde the 12 balls into 3 sets of 4. 公仔箱論壇) h* a" ]: D) w _( ^ ]7 a
weight any 2 sets.tvb now,tvbnow,bttvb4 B! E4 |' {, m9 ?
if the 2 sets are equal, then you know the heavy one is in the third
& i9 a, c/ {. y) cTVBNOW 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
& e8 S" H' v' p2 H8 {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.
: c5 M3 ?; ]3 E2 [$ B6 M' etvb now,tvbnow,bttvbweigh them公仔箱論壇* b* e! P0 A! t* D/ e' V- ^
and divide the heavier into 1
, s) \% m! G$ _3 |' T% Ewww3.tvboxnow.comand weight them.tvb now,tvbnow,bttvb2 _1 T8 Z3 h* M: V+ Z2 I
3 x weighing and get the ans.
7 [, i$ F, _, iin less than 15 secs. |