i find one solution that is similar 4 S9 E' r$ t1 u; ?8 m4 lbut i can't specify the heavier one is abnormal or the lighter one is abnormal when the case that has only two balls left....公仔箱論壇$ X( X* B8 `9 M5 a' O s7 _
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...