1. divide 6 and 6, both sides will not equaltvb now,tvbnow,bttvb, D! [ L$ J& V
2. take any side of the 6, divide then 3 and 3, again both sides will not equaltvb now,tvbnow,bttvb! v, x3 _/ E+ O& i8 G2 ]& e
3. take any 2 and weigh them1 A, V" p3 X9 R
if they equal, the one left is the ball.