put 3 balls on each side,
7 p d0 K! Q0 g) Y6 D7 w5.39.217.77:8898if balance, we can prove that all 6 balls on the 天平 is normal, 5.39.217.77:8898* {; c' A3 y1 r$ Y' x1 K
if not balance, we can prove that the 6 balls outside the 天平 is normal.
" B5 q4 H; U$ ~9 G. f& a公仔箱論壇then use the proved-normal ball on one side and put the other ball on other side
& j& K, l( |+ G; P4 ntvb now,tvbnow,bttvbto determine the abnormal is heavy and light |