1. 1st divide to half take the heavier out公仔箱論壇$ g/ j: l, V/ j0 O Y% ^) ]% g+ x
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)5.39.217.769 j! }* n% i1 \6 l! l8 I
3. Same method if is not equal on 2nd try.