1. divide 6 and 6, both sides will not equal 2 W; N5 J7 X: h5 ?公仔箱論壇2. take any side of the 6, divide then 3 and 3, again both sides will not equal$ G u8 B+ x, t2 @
3. take any 2 and weigh them* l' E; _- C3 X, @9 s; ?/ I$ G
if they equal, the one left is the ball.