divde the 12 balls into 3 sets of 4.
& X; y9 P& H4 m {. FTVBNOW 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。weight any 2 sets.
) \3 ]" {) [, F% U# [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 third
1 U- m. @. ?+ d2 ?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公仔箱論壇+ B3 \% S; {. _
then divide the 4 balls into 2.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。- A' v) F2 v, R! z% K8 ~9 e
weigh them# I, P( q3 b$ `9 P5 P
and divide the heavier into 1
2 _5 R2 Q6 F% N) i) I+ Cand weight them.tvb now,tvbnow,bttvb, y6 h( R7 E1 e' _" ]0 ]
3 x weighing and get the ans. . Z- g0 h: P! @& `! i y
in less than 15 secs. |