first divide it into 3 groups... 4 for each group...3 v- N" _" W6 N
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...
+ ^( s+ x) J. p0 \% F) F5 |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。den... left 4 balls...公仔箱論壇: X/ H C+ a3 V. l9 H: i
when u use tat 3 groups to test... u oredi know it is heavier or not...
$ \: j$ @" _9 Wtvb now,tvbnow,bttvbso when testing these 4 balls... u juz nit 2 find out the heavier or lighter 1...
! b+ {3 t7 B2 p$ ^公仔箱論壇take the heavier or lighter 1... throw away tat 2 normal ball...
7 ^. ~0 O, k2 _6 _5.39.217.76den u juz nit 2 test the last 2 balls...tvb now,tvbnow,bttvb7 n+ E1 l# Q# i2 [# R0 F
same for now... take the heavier or lighter 1... |