1. divide 6 and 6, both sides will not equal 3 s; q: i0 E% j- E2. take any side of the 6, divide then 3 and 3, again both sides will not equal9 A* I" ~# h {2 A1 p$ h
3. take any 2 and weigh them: W# r& u7 o, D: ~' t" v5 ?
if they equal, the one left is the ball.