put 3 balls on each side, tvb now,tvbnow,bttvb4 s @1 g6 D2 }7 D* q, l8 C7 j5 L+ K
if balance, we can prove that all 6 balls on the 天平 is normal,
) l. I2 M E" x+ l! J7 d. z3 a9 f; h5.39.217.76if not balance, we can prove that the 6 balls outside the 天平 is normal. C6 d, Y1 h. |8 P! S I1 G
then use the proved-normal ball on one side and put the other ball on other side : @0 t) `! ]) }. F
to determine the abnormal is heavy and light |