first divide it into 3 groups... 4 for each group...' U/ G9 p: z$ K% N5 X3 f( M! X
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 z' t! L2 _9 }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。( ?' ]0 [" m6 K- J$ A, ~4 B4 k! |
when u use tat 3 groups to test... u oredi know it is heavier or not...www1.tvboxnow.com- x! \3 j. I3 i3 L4 W2 O5 [9 O
so when testing these 4 balls... u juz nit 2 find out the heavier or lighter 1...
7 l9 Q- M# z v5 qtvb now,tvbnow,bttvbtake the heavier or lighter 1... throw away tat 2 normal ball...
9 ]( u; c2 X$ }, jden u juz nit 2 test the last 2 balls...
0 C% T, ^* l7 Ntvb now,tvbnow,bttvbsame for now... take the heavier or lighter 1... |