1. divide 6 and 6, both sides will not equal 0 T: ]& V( j# c2. take any side of the 6, divide then 3 and 3, again both sides will not equal ( {! N' V7 R6 K& [% {/ d公仔箱論壇3. take any 2 and weigh themtvb now,tvbnow,bttvb( \/ d. W0 E! `( I
if they equal, the one left is the ball.