1. divide 6 and 6, both sides will not equaltvb now,tvbnow,bttvb9 e$ g% Q/ J3 a
2. take any side of the 6, divide then 3 and 3, again both sides will not equal 7 U* B3 N" `& @3 K) V3. take any 2 and weigh them) C" j' f, I% q5 K
if they equal, the one left is the ball.