i found the ans in 30 mins but dont know correct or not?
2 o( M. }4 y% k( T8 ^/ Ftvb now,tvbnow,bttvbans is too long! but concepts are something like that:tvb now,tvbnow,bttvb+ f) z! ^3 D# l
seprate 4 groups 3 balls in one group! + Z9 b, O! [- e
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!
7 [, m) j1 Y- w7 p; x; ?: y. Ktvb now,tvbnow,bttvbthe last part is 1ball vs 1ball! something like that |