1. divide 6 and 6, both sides will not equal 0 H2 K* E0 E; e: v0 ^9 s2. take any side of the 6, divide then 3 and 3, again both sides will not equal! _" v: h$ U0 `9 D) B8 L7 B
3. take any 2 and weigh them& x+ ] x( f' j) T/ Z1 f
if they equal, the one left is the ball.