first divide it into 3 groups... 4 for each group...
0 a5 B/ P2 d8 P$ ~% T3 B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...; |% J: t; l o5 I. a, N# f& b( u
den... left 4 balls... q* k, t d9 k2 r- Q0 @
when u use tat 3 groups to test... u oredi know it is heavier or not...
- C+ u% i4 t3 F+ B, ?5 j, ptvb now,tvbnow,bttvbso when testing these 4 balls... u juz nit 2 find out the heavier or lighter 1...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。9 r; P6 W! {) d0 p. M% A @' f
take the heavier or lighter 1... throw away tat 2 normal ball...公仔箱論壇7 y* l3 D8 _9 e' d+ `7 w& x, @
den u juz nit 2 test the last 2 balls...
: {% S' Q8 r" S$ k) g5 itvb now,tvbnow,bttvbsame for now... take the heavier or lighter 1... |