divde the 12 balls into 3 sets of 4. 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。; A9 B6 x. E2 x# r
weight any 2 sets.
% B# j+ H6 _* h k% C% O! H1 Bif the 2 sets are equal, then you know the heavy one is in the third
: o2 @$ s- f2 ~, {if one of the 2 is heavier, then the heavy one is in that set a7 E Y$ ^* s$ S
then divide the 4 balls into 2.
1 D/ Q- H2 U1 h公仔箱論壇weigh themtvb now,tvbnow,bttvb3 R, ]- \* j% u% b$ J4 i
and divide the heavier into 1
- Y: O* f% K" \* Oand weight them.
3 u: @4 @6 p- I1 _& l: [1 xwww.tvboxnow.com3 x weighing and get the ans.
' w9 H9 S! I) N9 j公仔箱論壇in less than 15 secs. |