1. divide 6 and 6, both sides will not equal公仔箱論壇# I! U6 E! |" ^- O) L
2. take any side of the 6, divide then 3 and 3, again both sides will not equal * H* t0 I; C- o% m0 V7 i3. take any 2 and weigh them5 S2 ]1 d5 ?) V5 Q+ A/ p9 [
if they equal, the one left is the ball.