gensy850711

first divide it into 3 groups... 4 for each group...
, ^2 S$ [/ k5 X公仔箱論壇den use 2 groups to test... if the weight is same... den throw away these 2 groups.. if not... use another 1 group to test with tat 2 groups... throw away the same weight groups...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。' ?+ q  [+ P5 p0 i. c
den... left 4 balls...2 Y# r! G9 @2 \4 e4 ]
when u use tat 3 groups to test... u oredi know it is heavier or not...1 V" e" V. u0 ?2 ^: n
so when testing these 4 balls... u juz nit 2 find out the heavier or lighter 1...tvb now,tvbnow,bttvb4 I  i( g- V  t- l4 B
take the heavier or lighter 1... throw away tat 2 normal ball...公仔箱論壇. Q' B5 \  G. @; n
den u juz nit 2 test the last 2 balls...
: |) c+ X0 u& ]9 S2 i& ^公仔箱論壇same for now... take the heavier or lighter 1...