divde the 12 balls into 3 sets of 4. 公仔箱論壇% \; d6 @, ^% R$ c
weight any 2 sets.
: {7 H8 D7 R6 LTVBNOW 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 the 2 sets are equal, then you know the heavy one is in the thirdwww1.tvboxnow.com6 Q( n/ _" k( W; U
if one of the 2 is heavier, then the heavy one is in that set K' I( d1 K2 @( I
then divide the 4 balls into 2.tvb now,tvbnow,bttvb, a( ~ R2 T3 }# [/ t
weigh them
) u5 g" h3 D9 t( u! V7 Y( i/ [www1.tvboxnow.comand divide the heavier into 1
8 }% Z" I5 j4 L, O! g8 r公仔箱論壇and weight them.% t( O5 l3 a: C G! v! P$ a
3 x weighing and get the ans.
" \. _- u" F7 B! {$ gin less than 15 secs. |