divde the 12 balls into 3 sets of 4. 4 J' a5 V/ ?( f' A! } G
weight any 2 sets.
. H* d8 g" |: M3 b( ^5.39.217.77if the 2 sets are equal, then you know the heavy one is in the third
}; P" p: g( B4 L3 Q8 z& x( VTVBNOW 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
+ w* @& S. D0 H公仔箱論壇then divide the 4 balls into 2.公仔箱論壇- C" @/ h8 A' _; W; |) k( W( x
weigh them
+ N/ j3 M! N4 b2 C6 }$ M/ I. W6 }- w7 N# KTVBNOW 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。and divide the heavier into 1
% U, t, T: j, B6 R4 {8 ZTVBNOW 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。and weight them.公仔箱論壇0 f8 }8 f( y. E7 ~2 Q6 P0 U
3 x weighing and get the ans.
9 j \9 m# {9 j, ]公仔箱論壇in less than 15 secs. |