first divide it into 3 groups... 4 for each group...
; w3 j3 t5 n1 ^6 gden 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...
+ W9 ~# o; A8 M- b% O' ]# }den... left 4 balls...tvb now,tvbnow,bttvb5 ~ ^6 X3 M4 }$ m% U- i
when u use tat 3 groups to test... u oredi know it is heavier or not...
5 O1 a9 l' p: l0 x& u- mtvb now,tvbnow,bttvbso when testing these 4 balls... u juz nit 2 find out the heavier or lighter 1...
8 h' U. ~ I2 ]% o, {$ S; d5 vTVBNOW 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...
6 O8 [( t* e- g1 ?% Z( `, gden u juz nit 2 test the last 2 balls...( P% g& L8 t0 W6 ?4 ~
same for now... take the heavier or lighter 1... |