put 3 balls on each side, 5.39.217.77:8898, \+ D0 T& B8 t- f
if balance, we can prove that all 6 balls on the 天平 is normal, 7 e. r) M. K' S9 {: x) W: X4 I) z# H
if not balance, we can prove that the 6 balls outside the 天平 is normal.
. o0 P, N3 ?. m( b# ^4 u3 R' d! sthen use the proved-normal ball on one side and put the other ball on other side ( K3 {, G+ T3 E7 X
to determine the abnormal is heavy and light |