i find one solution that is similar $ Y8 T( }, Q, j' Z- \2 n/ r" F3 Zbut i can't specify the heavier one is abnormal or the lighter one is abnormal when the case that has only two balls left.... - F9 L: ~: s3 S3 O) pmaybe 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...