put 3 balls on each side,
. z0 ^: u0 Z" e9 F! W; g, {5 Dif balance, we can prove that all 6 balls on the 天平 is normal,
+ C& G) H' h& N. }公仔箱論壇if not balance, we can prove that the 6 balls outside the 天平 is normal.& |8 R( \ v6 Z% [8 H
then use the proved-normal ball on one side and put the other ball on other side 5 n& e% x Q$ x- I" ]6 i* L
to determine the abnormal is heavy and light |