first divide it into 3 groups... 4 for each group...& W' K: s; d0 o$ Y4 z9 O
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...公仔箱論壇6 e1 U4 g4 H1 f% l
den... left 4 balls...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 ^* r' K2 \5 d9 ~
when u use tat 3 groups to test... u oredi know it is heavier or not...公仔箱論壇 J3 Y& W, ~8 H: g6 x
so when testing these 4 balls... u juz nit 2 find out the heavier or lighter 1...3 l" E7 s; p# f& O d7 l' Q, N
take the heavier or lighter 1... throw away tat 2 normal ball...
, P8 P7 f, k+ mden u juz nit 2 test the last 2 balls...
. w' Q9 `3 ~0 y; p9 e) Otvb now,tvbnow,bttvbsame for now... take the heavier or lighter 1... |