divde the 12 balls into 3 sets of 4. ; D. z! B6 k1 r; j4 |4 S3 }! F) o) A. _
weight any 2 sets.公仔箱論壇4 h( M$ r9 |" G/ d+ H/ I6 m6 i
if the 2 sets are equal, then you know the heavy one is in the third5.39.217.777 _2 m2 B: L( W" N( S6 R
if one of the 2 is heavier, then the heavy one is in that set
! e1 g+ `1 g, Othen divide the 4 balls into 2.
4 `. ?2 H2 C. l" D+ X) y1 D1 N% ]weigh them
* O* V- z6 W/ r: u! RTVBNOW 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+ M3 r: Y) j# H
and weight them.
. `, }, W) n9 G" gtvb now,tvbnow,bttvb3 x weighing and get the ans. 公仔箱論壇! |3 i! ], D7 F, `3 t6 F# b
in less than 15 secs. |