first divide it into 3 groups... 4 for each group...5.39.217.766 B3 M; N% P2 A; \
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...
2 W" w0 z. r0 Kden... left 4 balls...
5 A. R) I% j, \5 \) xtvb now,tvbnow,bttvbwhen u use tat 3 groups to test... u oredi know it is heavier or not...
$ p; K* P. V X" Lso when testing these 4 balls... u juz nit 2 find out the heavier or lighter 1...
; L/ n0 e* k* o" H5.39.217.76take the heavier or lighter 1... throw away tat 2 normal ball...
5 t$ X# A& h& v- D- |公仔箱論壇den u juz nit 2 test the last 2 balls...tvb now,tvbnow,bttvb$ [& N, F: e6 m; }! }4 F2 p6 o5 {2 |* ?
same for now... take the heavier or lighter 1... |