1. 1st divide to half take the heavier out公仔箱論壇1 _ G! { D7 Q- ~+ w( Y
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)5.39.217.76- y- [3 j6 C) l- M6 }3 g( B
3. Same method if is not equal on 2nd try.