first divide it into 3 groups... 4 for each group...
" G. v' j9 }. j, y- l# X% `0 R公仔箱論壇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...
! ^" _0 ?5 o# h3 Gtvb now,tvbnow,bttvbden... left 4 balls...
* d- i% Z' t# Vwhen u use tat 3 groups to test... u oredi know it is heavier or not...tvb now,tvbnow,bttvb7 \9 T" F, [) s8 V% b5 b
so when testing these 4 balls... u juz nit 2 find out the heavier or lighter 1...www3.tvboxnow.com' z& O. s$ d9 c
take the heavier or lighter 1... throw away tat 2 normal ball...tvb now,tvbnow,bttvb) I1 _- M+ j E4 S: J
den u juz nit 2 test the last 2 balls...www3.tvboxnow.com6 a% K! W% k' ^ {" O& g
same for now... take the heavier or lighter 1... |