1. divide 6 and 6, both sides will not equal ( @ r& n3 }# D/ [8 C; |2. take any side of the 6, divide then 3 and 3, again both sides will not equal ! n d" P1 c6 e- A0 H3. take any 2 and weigh them公仔箱論壇. r! j; U3 {1 F' G
if they equal, the one left is the ball.