divde the 12 balls into 3 sets of 4. 公仔箱論壇- O0 I1 V1 m# _5 @
weight any 2 sets.
' ~4 F# j" E1 M# ^& dif the 2 sets are equal, then you know the heavy one is in the third
2 g! S" h6 E- C" _9 gTVBNOW 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
, \, ?" r4 u r4 h) n Q9 p9 Sthen divide the 4 balls into 2.+ V) z6 e9 J$ h5 M* D0 O g
weigh them
% I9 L' H' H9 C# `9 }公仔箱論壇and divide the heavier into 1
- y/ ~3 u, R# N4 wand weight them.
( w' D' k3 g! t4 c3 dTVBNOW 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。3 x weighing and get the ans. ' q. P! \7 C$ E7 f: e
in less than 15 secs. |