put 3 balls on each side,
' _* E# F$ q& P. Uif balance, we can prove that all 6 balls on the 天平 is normal,
" D, l( P1 U* t: Tif not balance, we can prove that the 6 balls outside the 天平 is normal.$ c* Z: Z# d: T
then use the proved-normal ball on one side and put the other ball on other side
( Y2 t v+ k& q& h) M& ]tvb now,tvbnow,bttvbto determine the abnormal is heavy and light |