1. 1st divide to half take the heavier out * {; h8 k& J/ _& ?2. 2nd take 4 balls out of 5 divide 2 groups to get the heavier out. (if is equal thn the remain is the one u looking for) ( H4 z; `1 G. {. ?7 v3. Same method if is not equal on 2nd try.
本帖最後由 reevesrr 於 2011-11-12 07:49 PM 編輯 公仔箱論壇! i. J0 q/ B$ f, f. M& T% g2 {- f( }) e
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