first divide it into 3 groups... 4 for each group...
1 g5 }: T9 O. V1 F g3 ~2 t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.../ `" `, K6 }# R4 V% t
den... left 4 balls...
2 V. g7 b/ K) r1 stvb now,tvbnow,bttvbwhen u use tat 3 groups to test... u oredi know it is heavier or not...9 f ~3 o: m h
so when testing these 4 balls... u juz nit 2 find out the heavier or lighter 1...
3 J/ w8 F' w- A4 \/ e7 mtake the heavier or lighter 1... throw away tat 2 normal ball...
" Z8 }' q! J% xtvb now,tvbnow,bttvbden u juz nit 2 test the last 2 balls...
$ c2 Q+ u: [: J6 Cwww2.tvboxnow.comsame for now... take the heavier or lighter 1... |