i find one solution that is similar4 o% m4 D" d0 _5 a: Y
but i can't specify the heavier one is abnormal or the lighter one is abnormal when the case that has only two balls left.... : t2 P% ~7 c. g2 C/ Q! v+ B% Vmaybe 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...