maaaary

1. divide 6 and 6, both sides will not equal
" j  N! ?% z4 x8 m2. take any side of the 6, divide then 3 and 3, again both sides will not equal% \/ @+ X2 v' U/ i5 J, B. U0 U
3. take any 2 and weigh them. e/ E; l( _8 q8 B& K. L/ e- D& i0 ^
if they equal, the one left is the ball.