put 3 balls on each side, 5.39.217.762 e+ p' Z0 o# l3 i5 Y. x; e" @
if balance, we can prove that all 6 balls on the 天平 is normal, tvb now,tvbnow,bttvb. c' ^1 ~' I( b" h) ]& g3 d- E
if not balance, we can prove that the 6 balls outside the 天平 is normal.
: i, a2 O; v/ q) |+ i0 O+ qtvb now,tvbnow,bttvbthen use the proved-normal ball on one side and put the other ball on other side
" |' ~9 x2 I$ M2 ^4 yto determine the abnormal is heavy and light |
發表於 2011-5-11 04:50 AM
| 
