i find one solution that is similar 7 X2 c' x& W# e6 I" S3 @& J7 Pbut 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3 x( u/ ^: q8 |+ V( T# c
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...