1. divide 6 and 6, both sides will not equal) ]# s4 j! W9 a, [0 K- j
2. take any side of the 6, divide then 3 and 3, again both sides will not equal ! i, b! M2 z& U7 m T; ^, f3. take any 2 and weigh them公仔箱論壇% h L$ U- J' |9 ~0 K* m
if they equal, the one left is the ball.