first divide it into 3 groups... 4 for each group...
4 E) L- J2 w, T- e$ C6 [4 o0 y: oTVBNOW 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。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...5.39.217.76: R. |7 B% q- [8 Z8 r8 i' o
den... left 4 balls...' G& {! A2 |% M& t8 w! P
when u use tat 3 groups to test... u oredi know it is heavier or not...
& Q7 n+ @! H# i! g" ~5.39.217.76so when testing these 4 balls... u juz nit 2 find out the heavier or lighter 1...tvb now,tvbnow,bttvb! b8 z# z, }+ M0 z! J. q1 G8 u
take the heavier or lighter 1... throw away tat 2 normal ball...
4 w8 a* C# D5 r+ ptvb now,tvbnow,bttvbden u juz nit 2 test the last 2 balls...5.39.217.763 S& D- U2 A1 I' w4 f8 g
same for now... take the heavier or lighter 1... |