put 3 balls on each side, 8 b# Q. f3 j. c7 h
if balance, we can prove that all 6 balls on the 天平 is normal, tvb now,tvbnow,bttvb* q$ ^, B1 y1 d6 L7 u0 }3 I. Q
if not balance, we can prove that the 6 balls outside the 天平 is normal.公仔箱論壇3 s/ j4 E E+ Z4 a
then use the proved-normal ball on one side and put the other ball on other side
6 c9 I% }; P) Q; R! K公仔箱論壇to determine the abnormal is heavy and light |
發表於 2011-5-11 04:50 AM
| 
