put 3 balls on each side, tvb now,tvbnow,bttvb }0 w& F H f4 r! N' j
if balance, we can prove that all 6 balls on the 天平 is normal,
, q& F& k4 w. L) {9 q. u2 K2 w* iif not balance, we can prove that the 6 balls outside the 天平 is normal.tvb now,tvbnow,bttvb) G! b1 O$ x) Y( ~9 F4 x
then use the proved-normal ball on one side and put the other ball on other side
3 H' b$ F, w6 A7 Y8 B$ E3 Y6 @5.39.217.76to determine the abnormal is heavy and light |