divde the 12 balls into 3 sets of 4. 3 u# {9 a, r8 ?9 S: P$ d
weight any 2 sets.
/ a: B! C8 L L/ b. s公仔箱論壇if the 2 sets are equal, then you know the heavy one is in the third
& V& Q" G9 Z$ l: ^) S- Q+ fif one of the 2 is heavier, then the heavy one is in that set
9 s' L' U3 k2 UTVBNOW 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.
9 U, K$ l5 A1 c& O公仔箱論壇weigh them4 @3 f/ R2 z) [+ z4 o
and divide the heavier into 12 L( o; M* _) C+ ?/ w3 i
and weight them.
0 g% `* x2 v2 Y1 y) ]3 x weighing and get the ans.
9 {# d- k+ {, V- ^7 F5.39.217.77in less than 15 secs. |