put 3 balls on each side,
. ~( M" s. \, i% e! Z9 qif balance, we can prove that all 6 balls on the 天平 is normal,
' @5 d1 z6 W* C8 M4 |/ e6 Ltvb now,tvbnow,bttvbif not balance, we can prove that the 6 balls outside the 天平 is normal.
. w. V% t3 L4 ?; R1 rtvb now,tvbnow,bttvbthen use the proved-normal ball on one side and put the other ball on other side 8 i- l3 d* B9 P6 C
to determine the abnormal is heavy and light |