1. divide 6 and 6, both sides will not equal 7 Q" `- M0 |8 C; btvb now,tvbnow,bttvb2. take any side of the 6, divide then 3 and 3, again both sides will not equal 4 t A- G' J A5 }/ h; q公仔箱論壇3. take any 2 and weigh them 9 d* }" m& o* n" ~( K: P- Ttvb now,tvbnow,bttvbif they equal, the one left is the ball.