i find one solution that is similar : ? x% M3 e& ~8 \( Y' ybut i can't specify the heavier one is abnormal or the lighter one is abnormal when the case that has only two balls left....1 D: _5 e& B) L" u
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...