i find one solution that is similar公仔箱論壇' X! @, O: P1 w8 f6 t% T
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.... / @0 k$ M9 y1 \; R _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...