put 3 balls on each side, tvb now,tvbnow,bttvb3 C3 j, m4 ?7 W' L: Q# V
if balance, we can prove that all 6 balls on the 天平 is normal,
3 R2 j0 F6 i( K% ~% M* ?if not balance, we can prove that the 6 balls outside the 天平 is normal.tvb now,tvbnow,bttvb& ^; j8 J- I- q4 t; R& n9 T$ d6 f% g
then use the proved-normal ball on one side and put the other ball on other side
1 a0 t# W% r2 ?9 k$ v2 P4 P公仔箱論壇to determine the abnormal is heavy and light |