divde the 12 balls into 3 sets of 4. $ p2 G0 _' B; X% l/ ?3 w
weight any 2 sets.
8 t+ m6 L: P! Q) e! x R3 TTVBNOW 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 third
5 K) u) }9 l/ o2 Z5.39.217.77if one of the 2 is heavier, then the heavy one is in that set$ G1 P+ U. U3 q
then divide the 4 balls into 2.
' h/ w+ }( j7 V0 |1 G* ]公仔箱論壇weigh them0 p) s' `8 r6 ?& u" c$ ?( P
and divide the heavier into 1tvb now,tvbnow,bttvb1 ^9 V7 {9 A( v, [8 O5 F
and weight them.
: A5 R7 e4 p/ m9 }; W公仔箱論壇3 x weighing and get the ans.
: K: Q: ~+ }7 u3 S$ A$ g) L/ Uin less than 15 secs. |