1. divide 6 and 6, both sides will not equal% q# R9 t2 o( M* S* u- V9 F
2. take any side of the 6, divide then 3 and 3, again both sides will not equal % [9 b0 d$ X a- q1 Y公仔箱論壇3. take any 2 and weigh them5.39.217.77" ]- b- A; Q$ F8 S
if they equal, the one left is the ball.