1. divide 6 and 6, both sides will not equaltvb now,tvbnow,bttvb' e6 `7 P! i8 `8 d, _- p3 v
2. take any side of the 6, divide then 3 and 3, again both sides will not equal # K- _. w% N) ?# f8 B3. take any 2 and weigh them : r, m1 E0 @6 P C$ W. ~if they equal, the one left is the ball.