1. 1st divide to half take the heavier out 2 Z1 v& s# \3 \3 g! b% J0 h( T2. 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)公仔箱論壇6 X/ H7 [, A" k' z7 p
3. Same method if is not equal on 2nd try.