1. 1st divide to half take the heavier out
L' {" L' z% v- p& ?; y; ?tvb now,tvbnow,bttvb2. 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2 K" e. i+ `( S% ]5 Q
3. Same method if is not equal on 2nd try. |