divde the 12 balls into 3 sets of 4. . Z: U5 c8 r* d% ?# T- ^
weight any 2 sets.
F6 ?# M3 b: o! M; F1 K公仔箱論壇if the 2 sets are equal, then you know the heavy one is in the thirdTVBNOW 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。: M. W9 W9 @1 V1 a% J
if one of the 2 is heavier, then the heavy one is in that set& _* u1 O, y2 A, }; e% }
then divide the 4 balls into 2.: w2 W4 ?9 _; x. U/ b
weigh themTVBNOW 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。6 x# V7 g3 r7 m q! c
and divide the heavier into 1
/ L) A$ @* \5 m$ ?3 a公仔箱論壇and weight them.
' D4 k3 b. k$ N' B0 i3 q" j" o# utvb now,tvbnow,bttvb3 x weighing and get the ans.
" D- Q7 W+ j1 l2 t; D+ R: fTVBNOW 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。in less than 15 secs. |