1. divide 6 and 6, both sides will not equal / s' A4 O; o; U/ [$ }公仔箱論壇2. take any side of the 6, divide then 3 and 3, again both sides will not equal A T# j4 b4 f+ F }- I4 V; J! O公仔箱論壇3. take any 2 and weigh them $ J% M0 \! B& a9 e公仔箱論壇if they equal, the one left is the ball.