first divide it into 3 groups... 4 for each group...! M5 i: b6 D% J2 k& l8 z0 E# w' ^/ k
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...
) T1 C5 B8 V* w+ v0 P }tvb now,tvbnow,bttvbden... left 4 balls...
1 j/ T0 U( w" [, T4 r& ]. I5.39.217.77:8898when u use tat 3 groups to test... u oredi know it is heavier or not...2 r7 L! K2 W) ~$ O
so when testing these 4 balls... u juz nit 2 find out the heavier or lighter 1...
% {4 q- K8 p8 N& e: L! u/ U5.39.217.77:8898take the heavier or lighter 1... throw away tat 2 normal ball...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。1 B( W* g9 @7 A1 T7 F8 Q
den u juz nit 2 test the last 2 balls...
5 m, W2 `- A2 G* F. gtvb now,tvbnow,bttvbsame for now... take the heavier or lighter 1... |