divde the 12 balls into 3 sets of 4.
/ R o3 }9 S9 a: nweight any 2 sets.
% ^/ o' p- `( ?5 q$ D+ R5 B& L& _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 the 2 sets are equal, then you know the heavy one is in the third2 [3 o. m+ s; S8 ^- O0 Z) n
if one of the 2 is heavier, then the heavy one is in that set
. b: O( R8 F3 X4 w1 `9 s& h! ^tvb now,tvbnow,bttvbthen divide the 4 balls into 2.
! W; O2 O* r8 L% v9 L/ Lweigh 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。* `& d8 ]7 `/ ~/ Q3 k2 {
and divide the heavier into 1
1 c4 i& a' n# A6 w. Vand weight them.
5 a- b4 a+ _ z3 k! ~: W x( Y2 O3 x weighing and get the ans.
. q2 F: l$ h0 x6 Etvb now,tvbnow,bttvbin less than 15 secs. |