first divide it into 3 groups... 4 for each group...( J' j- z# v4 Y3 C# q
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 d; v; g, W8 D+ M" Btvb now,tvbnow,bttvbden... left 4 balls...
( I- _% R5 y& L( _公仔箱論壇when u use tat 3 groups to test... u oredi know it is heavier or not...公仔箱論壇9 V s9 |& U& d
so when testing these 4 balls... u juz nit 2 find out the heavier or lighter 1...
+ O9 x& w" w, Ttvb now,tvbnow,bttvbtake the heavier or lighter 1... throw away tat 2 normal ball..." Y5 [* x! g# \
den u juz nit 2 test the last 2 balls...公仔箱論壇4 ~7 ` P4 Z' ^8 {+ o2 {+ A5 `
same for now... take the heavier or lighter 1... |