i find one solution that is similar9 \1 u O; Y7 n% r. r" ^6 i! l5 S& _
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 x% L/ l1 R' a: f3 m公仔箱論壇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...