put 3 balls on each side,
) R9 h) s2 @; H, l% h- Vwww2.tvboxnow.comif balance, we can prove that all 6 balls on the 天平 is normal, ! H: a9 j! u+ q
if not balance, we can prove that the 6 balls outside the 天平 is normal.
p# v9 s' c! w% U0 e7 Z, s$ Fthen use the proved-normal ball on one side and put the other ball on other side
& j J5 ?6 j) o9 N8 M; p+ {% iwww2.tvboxnow.comto determine the abnormal is heavy and light |