first divide it into 3 groups... 4 for each group...
3 A- G* R" A% t5 C$ swww2.tvboxnow.comden 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...
* o1 b( o' z2 ]2 m3 G m. W公仔箱論壇den... left 4 balls...7 W g* q$ K G5 _* e0 o" m9 k- s
when u use tat 3 groups to test... u oredi know it is heavier or not...9 X; E, H5 t5 ]) V. j
so when testing these 4 balls... u juz nit 2 find out the heavier or lighter 1...tvb now,tvbnow,bttvb3 E+ e0 b; l, P+ s* Z
take the heavier or lighter 1... throw away tat 2 normal ball...
2 `' N% j1 T! D! fden u juz nit 2 test the last 2 balls...www2.tvboxnow.com2 E5 {3 X- m9 ?. t, d2 G! S
same for now... take the heavier or lighter 1... |