i find one solution that is similar + A: Z! p+ n7 W( q3 d5.39.217.77but i can't specify the heavier one is abnormal or the lighter one is abnormal when the case that has only two balls left.... 2 ~! P2 U) f/ C _/ lmaybe there is a better one, let me see sin
actually this question always have someone asked, the calculation is very complicated, should give a no. of each ball, and first weight it in 6-6, and .... forgot...