divde the 12 balls into 3 sets of 4. 5.39.217.763 X' ^* W( F }5 p
weight any 2 sets.5.39.217.764 |2 j$ n* q" W6 p" j1 J
if the 2 sets are equal, then you know the heavy one is in the third
! d7 @- U+ P: j/ L$ b) H: aif one of the 2 is heavier, then the heavy one is in that set
- c( j F7 R O. q& p5 h8 a# H: rthen divide the 4 balls into 2.公仔箱論壇 r. Z0 H0 Z0 a
weigh them
. g% A6 }- _2 f" Ntvb now,tvbnow,bttvband divide the heavier into 1" A" B- N- t6 D- j+ B
and weight them.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。7 j3 ]* {& K5 M1 i; H- Z
3 x weighing and get the ans.
' Z8 v7 }9 @& j% c9 i' lTVBNOW 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. |