1. divide 6 and 6, both sides will not equal( C8 O3 J) M! s- a8 [5 G
2. take any side of the 6, divide then 3 and 3, again both sides will not equal ( O' P" @0 V w$ s; N5 w# b公仔箱論壇3. take any 2 and weigh themtvb now,tvbnow,bttvb# B9 |) u7 G+ Q$ N; `3 Q8 }& V6 o
if they equal, the one left is the ball.