divde the 12 balls into 3 sets of 4.
, E k! a% W* u2 w& h) qtvb now,tvbnow,bttvbweight any 2 sets.* j h6 X* g% L
if the 2 sets are equal, then you know the heavy one is in the third
2 f V3 @2 Y f6 a8 Sif one of the 2 is heavier, then the heavy one is in that setTVBNOW 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。5 I( l9 M5 d7 ~" [9 g, t
then divide the 4 balls into 2.公仔箱論壇% d9 Y/ y+ a! G+ S4 G# H
weigh themtvb now,tvbnow,bttvb$ o z! y5 q8 t# `$ A
and divide the heavier into 1tvb now,tvbnow,bttvb E) Y' }* }! I6 U$ u O/ m( |2 {
and weight them.5 X2 q/ g6 ~# C5 U9 r
3 x weighing and get the ans. 5.39.217.77: K1 ^3 W# K _5 O3 p; c+ H
in less than 15 secs. |