divde the 12 balls into 3 sets of 4. 1 J, Q' T/ d- \& |
weight any 2 sets.
3 q1 M4 P$ R( l0 n3 p7 gtvb now,tvbnow,bttvbif the 2 sets are equal, then you know the heavy one is in the third: x+ h! n% E& k
if one of the 2 is heavier, then the heavy one is in that setTVBNOW 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。 D3 @6 R3 b" N5 |' k. Q2 \7 z
then divide the 4 balls into 2., g2 j g( a! h3 F1 C- [, g$ Y
weigh them
1 E8 A' s( `1 R公仔箱論壇and divide the heavier into 1
/ K' p5 Y" o* P5.39.217.77:8898and weight them., g* h5 S0 ~' }8 S; g
3 x weighing and get the ans.
/ T& e7 @" e$ t2 t* @& F# U2 {公仔箱論壇in less than 15 secs. |