1. divide 6 and 6, both sides will not equal 1 {" C' R$ c9 @0 m4 D4 M. B公仔箱論壇2. take any side of the 6, divide then 3 and 3, again both sides will not equal c$ {' E1 C) ?
3. take any 2 and weigh them6 E2 C. p: [$ p' m. R& j0 n
if they equal, the one left is the ball.