put 3 balls on each side,
" @( Y. M$ A9 H8 xtvb now,tvbnow,bttvbif balance, we can prove that all 6 balls on the 天平 is normal, 5.39.217.77:8898* }" N. I1 u- T! O3 Q5 Q
if not balance, we can prove that the 6 balls outside the 天平 is normal.公仔箱論壇0 t. R! S* N" a6 K
then use the proved-normal ball on one side and put the other ball on other side
3 Y9 p2 H5 J% t! y5 {* R7 S5.39.217.77:8898to determine the abnormal is heavy and light |