put 3 balls on each side, 4 W" `, N. d( f3 u$ e9 A' [
if balance, we can prove that all 6 balls on the 天平 is normal,
]% w8 H# |9 @. S5.39.217.76if not balance, we can prove that the 6 balls outside the 天平 is normal.TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。: q) B9 \3 n: Z; }5 R2 w
then use the proved-normal ball on one side and put the other ball on other side
) V8 r" y9 f. R7 u! ^5.39.217.76to determine the abnormal is heavy and light |