first divide it into 3 groups... 4 for each group...% X8 f2 S8 h$ [/ }; m( ~
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...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。: k, M! K, S; B# R* Y3 K6 V. s6 q3 J
den... left 4 balls...
$ \4 a9 L/ \, ?1 ~1 {7 ~, jwhen u use tat 3 groups to test... u oredi know it is heavier or not...
5 j$ n: F: d1 Yso when testing these 4 balls... u juz nit 2 find out the heavier or lighter 1...; _3 M% Y8 C5 {
take the heavier or lighter 1... throw away tat 2 normal ball...
R/ m+ D N% U, j3 o% otvb now,tvbnow,bttvbden u juz nit 2 test the last 2 balls...8 c. K, g. ~( b$ ^$ k- z
same for now... take the heavier or lighter 1... |