1. divide 6 and 6, both sides will not equal & n D: r7 ]. Y# k- f公仔箱論壇2. take any side of the 6, divide then 3 and 3, again both sides will not equal0 e& U8 {& X- ^, K4 h
3. take any 2 and weigh them公仔箱論壇0 C/ E) j7 w c! H
if they equal, the one left is the ball.