first divide it into 3 groups... 4 for each group...公仔箱論壇, e3 r+ e/ s) v4 C( N5 D2 C
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 x9 ]2 P. ]: ?: w& u" U公仔箱論壇den... left 4 balls...
5 _3 I( A! l4 Nwhen u use tat 3 groups to test... u oredi know it is heavier or not...www2.tvboxnow.com# f4 d4 O5 P4 E% {; C% w3 }0 `' o
so when testing these 4 balls... u juz nit 2 find out the heavier or lighter 1...
5 n7 V3 X+ ^' D9 l公仔箱論壇take the heavier or lighter 1... throw away tat 2 normal ball...tvb now,tvbnow,bttvb4 |4 X; b3 M9 t, {/ M- {; K) {, D3 \
den u juz nit 2 test the last 2 balls...
6 s4 t* ~+ ?& y3 j$ p公仔箱論壇same for now... take the heavier or lighter 1... |