this is too easy!!, }2 [2 [2 M' O5 [; f2 N
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1. put 6 at each side.. take the one side which is heavier
) ?5 i8 O9 I; ^% D2 c1 d2. put 3 at each side.. also take the heavier side公仔箱論壇# f+ T! G1 N4 h" L8 F# z8 k A
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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