put 3 balls on each side,
& |: ^2 M! y" Ltvb now,tvbnow,bttvbif balance, we can prove that all 6 balls on the 天平 is normal,
6 q' y( z, n( C, X+ ~2 H5.39.217.76if not balance, we can prove that the 6 balls outside the 天平 is normal.
+ J1 e% Z+ e, Y! Z$ V8 J8 zthen use the proved-normal ball on one side and put the other ball on other side 5.39.217.76- U& ?/ S9 C) j8 E
to determine the abnormal is heavy and light |