put 3 balls on each side, 公仔箱論壇$ t4 m0 n0 F6 x* J5 M
if balance, we can prove that all 6 balls on the 天平 is normal, " _: u/ h% B0 k: M) _# o
if not balance, we can prove that the 6 balls outside the 天平 is normal.www2.tvboxnow.com) i) k1 C6 l6 v- _
then use the proved-normal ball on one side and put the other ball on other side www2.tvboxnow.com3 Z- G/ f) k! R: w/ y* a& y
to determine the abnormal is heavy and light |
發表於 2011-5-11 04:50 AM
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