1. divide 6 and 6, both sides will not equal ( a0 N5 |: D' G) ?+ }公仔箱論壇2. take any side of the 6, divide then 3 and 3, again both sides will not equal ; w6 |# V/ D3 o3. take any 2 and weigh them% e' m# V! j1 C
if they equal, the one left is the ball.