this is too easy!!
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1. put 6 at each side.. take the one side which is heavier公仔箱論壇' }7 K8 r- o' P% ~& a* F5 \
2. put 3 at each side.. also take the heavier side9 s- J9 E6 @' T9 K4 F J( R
3. 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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