put 3 balls on each side, tvb now,tvbnow,bttvb7 u! m3 w/ _. S, U* E& e M' u; T
if balance, we can prove that all 6 balls on the 天平 is normal,
7 ?3 A& ~$ N- @5 {# }4 M公仔箱論壇if not balance, we can prove that the 6 balls outside the 天平 is normal.
]8 s B0 v; ~8 rthen use the proved-normal ball on one side and put the other ball on other side tvb now,tvbnow,bttvb: L* p* n m& e% ~+ L. c9 z2 k% T8 Z% M
to determine the abnormal is heavy and light |