divde the 12 balls into 3 sets of 4. 公仔箱論壇) U) H+ G1 c* Z
weight 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。' g9 _) Q5 L3 ~% P$ T
if the 2 sets are equal, then you know the heavy one is in the third
6 i G$ i3 ^# G7 D: wif one of the 2 is heavier, then the heavy one is in that set# W% `; {! Y! r B. V& Z
then divide the 4 balls into 2.
h6 _' a: ~7 v7 |& 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。weigh them
% ]3 b/ \; d7 Y公仔箱論壇and divide the heavier into 1
/ ]4 M, L$ r6 i5 J% w+ M/ }1 Rtvb now,tvbnow,bttvband weight them.公仔箱論壇7 `, p+ a5 K% Z! i% \5 l+ H q }
3 x weighing and get the ans. 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。0 {- U' h2 c* h
in less than 15 secs. |