kochipai

1. 1st divide to half take the heavier out
5 L, s# |2 |, ]7 i' O/ k公仔箱論壇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)
" R5 s' A- W+ n* g3. Same method if is not equal on 2nd try.