i find one solution that is similar / n$ \3 ~2 D' Y2 H. E" t, N' ?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..... x( \# W, a) [' l
maybe 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...