divde the 12 balls into 3 sets of 4. 公仔箱論壇& L8 m. Y, [/ P. Z0 D( i% ^3 B
weight any 2 sets.
$ x/ Q& j5 ~4 S3 h9 ^) x9 v6 Zif the 2 sets are equal, then you know the heavy one is in the third
2 s3 ~& `; B( ]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。if one of the 2 is heavier, then the heavy one is in that set
0 G% @% v3 q/ j. l: F5.39.217.77then divide the 4 balls into 2.
8 R% x5 o4 G% a' {+ I" A+ Eweigh them/ p& q. r; _3 U5 g
and divide the heavier into 1
# q+ T ]9 o9 v7 M/ i$ x0 b1 |- ZTVBNOW 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。and weight them.
- z3 x( ~3 N, f3 x weighing and get the ans.
% E7 ^3 j V# M# wTVBNOW 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. |