first divide it into 3 groups... 4 for each group...
6 I3 b8 x$ a% s3 G h8 Qtvb now,tvbnow,bttvbden 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...
6 }+ }0 K" z: Q( p1 Wden... left 4 balls...www3.tvboxnow.com, n" P) G5 {! {, d
when u use tat 3 groups to test... u oredi know it is heavier or not...
9 k" E. R& K L7 ]5 `tvb now,tvbnow,bttvbso when testing these 4 balls... u juz nit 2 find out the heavier or lighter 1...
, o* l9 [ R, I5 t: utake the heavier or lighter 1... throw away tat 2 normal ball...tvb now,tvbnow,bttvb' R$ W3 B. F0 ?" E3 T9 D" I* l7 M
den u juz nit 2 test the last 2 balls...公仔箱論壇+ w; a! D$ }$ \- o
same for now... take the heavier or lighter 1... |