1. divide 6 and 6, both sides will not equal . @/ j- \) c6 ^" k0 ?/ ?2. take any side of the 6, divide then 3 and 3, again both sides will not equal公仔箱論壇% t1 _# @7 t/ U
3. take any 2 and weigh them 3 i3 |9 B4 u( A$ t! Z! r公仔箱論壇if they equal, the one left is the ball.