divde the 12 balls into 3 sets of 4. tvb now,tvbnow,bttvb( ^3 f$ Q9 B: a1 E4 s
weight any 2 sets.
+ E5 J; Z: @1 b2 W8 Y' ]tvb now,tvbnow,bttvbif the 2 sets are equal, then you know the heavy one is in the third
2 c) @. P: P; ] Xif one of the 2 is heavier, then the heavy one is in that set
9 E: G6 ?, k5 g$ p, T( Othen divide the 4 balls into 2.
, ^1 P) `% R, q! F! O: `公仔箱論壇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。* o8 H; A8 I# Z6 \
and divide the heavier into 1
5 i9 U/ M% N% N6 ] mand weight them.* f$ K2 f2 L _# E/ z7 a
3 x weighing and get the ans.
, M1 O, ^9 w ztvb now,tvbnow,bttvbin less than 15 secs. |