i found the ans in 30 mins but dont know correct or not?2 S2 o! Y8 [4 s3 _, Y, }
ans is too long! but concepts are something like that:
4 | }2 A6 W( y1 ~seprate 4 groups 3 balls in one group! 7 b/ `, W ~2 l5 z1 n/ v
the important part is the 2nd times which need to find out the fake ball is heavier or lighter by use the normal ball that u find at the first time!) ?4 n( {4 N) \9 T# Y
the last part is 1ball vs 1ball! something like that |