first divide it into 3 groups... 4 for each group...
) j' h* E8 P! Y- }' A, c. N2 |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...
4 m$ W/ Q3 C0 g; F! D' t& D0 O4 R, s( Qden... left 4 balls...7 J' w( H0 J& X2 S( A
when u use tat 3 groups to test... u oredi know it is heavier or not...7 k1 Z2 J1 I3 p, ^
so when testing these 4 balls... u juz nit 2 find out the heavier or lighter 1...
, c" g! D& K* d7 z9 ]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。take the heavier or lighter 1... throw away tat 2 normal ball...
3 z( o, x- p+ Z$ [5.39.217.76den u juz nit 2 test the last 2 balls...
0 p3 a) c9 e4 [" p) gTVBNOW 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。same for now... take the heavier or lighter 1... |