this is too easy!!
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1. put 6 at each side.. take the one side which is heavier
w. n2 h: j: C* K9 g9 o* [7 N公仔箱論壇2. put 3 at each side.. also take the heavier sidewww1.tvboxnow.com# f _0 E4 D, x7 {9 d! }/ g
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.. |