first divide it into 3 groups... 4 for each group...
4 ]6 @0 s! o# }/ H, M2 z* I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...tvb now,tvbnow,bttvb l" Q, Z& g4 M/ A: g
den... left 4 balls...公仔箱論壇8 H0 ], e5 U+ f- Y
when u use tat 3 groups to test... u oredi know it is heavier or not...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。, ^" E) H/ f1 t+ W6 D! x; d" ^/ }: p
so when testing these 4 balls... u juz nit 2 find out the heavier or lighter 1...www3.tvboxnow.com3 x+ Q' d( k& O! \7 B2 N# W
take the heavier or lighter 1... throw away tat 2 normal ball...
* p% q! E+ x, K; d4 s! D, @8 Sden u juz nit 2 test the last 2 balls...
& |- q. Q# X) {+ y2 ?' _/ Csame for now... take the heavier or lighter 1... |