1. divide 6 and 6, both sides will not equal! y2 P! P; R% x5 q# q
2. take any side of the 6, divide then 3 and 3, again both sides will not equal / n+ k+ t- y$ l" i5 ?3. take any 2 and weigh them公仔箱論壇2 j; L; U* m/ `) g5 \& T4 G6 _
if they equal, the one left is the ball.