this is too easy!!
% N% ^5 k$ P4 p9 d* L; M! F公仔箱論壇5 L# [# ]+ w( I- o( }: O
1. put 6 at each side.. take the one side which is heavier/ ~! [$ ?0 h% L/ k
2. put 3 at each side.. also take the heavier side
- U+ e7 f2 B* ?9 W, S( s; c9 Q! v3. put 1 at each side.. if the weight balance then the one not put inside is the heavy ball.. else the side which is heavier is the heavier ball.. |
發表於 2009-1-7 05:31 AM
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