this is too easy!!公仔箱論壇% r% R, |0 B+ j, m. W; i
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1. put 6 at each side.. take the one side which is heavier) s7 h5 ^& z! _. @# H1 _1 U2 s
2. put 3 at each side.. also take the heavier side
9 B0 x) j- t8 d1 U3. 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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