1. divide 6 and 6, both sides will not equal ) i/ p9 s1 X7 Z2. take any side of the 6, divide then 3 and 3, again both sides will not equal 1 i- c& z; r' [- k5 \' z公仔箱論壇3. take any 2 and weigh them0 ~" V6 q; i b) q# J
if they equal, the one left is the ball.