maaaary

1. divide 6 and 6, both sides will not equal公仔箱論壇5 l8 k7 m- a8 l' U$ o0 S
2. take any side of the 6, divide then 3 and 3, again both sides will not equal2 Q1 e5 ?. @2 i7 F% v
3. take any 2 and weigh themtvb now,tvbnow,bttvb% J- ~1 C0 t! z* d
if they equal, the one left is the ball.