first divide it into 3 groups... 4 for each group...tvb now,tvbnow,bttvb; U: [- x8 f) Q9 X+ q% O8 _
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...
( r0 F& p3 H d/ F8 m; X# hTVBNOW 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。den... left 4 balls...3 L! }. P3 ]2 t4 q2 Q5 J# M
when u use tat 3 groups to test... u oredi know it is heavier or not...- I/ `$ }0 D* s
so when testing these 4 balls... u juz nit 2 find out the heavier or lighter 1...
, B' t7 P0 D _) [. Xtvb now,tvbnow,bttvbtake the heavier or lighter 1... throw away tat 2 normal ball...
& t1 c" S9 Q5 Pden u juz nit 2 test the last 2 balls...公仔箱論壇- e7 `1 t& I' W& b; t
same for now... take the heavier or lighter 1... |