i found the ans in 30 mins but dont know correct or not?( a2 j6 F$ C, \9 _( ?
ans is too long! but concepts are something like that:tvb now,tvbnow,bttvb4 x- k! s( G7 q9 b
seprate 4 groups 3 balls in one group!
* u! N3 x, c# u$ {2 a: L9 dtvb now,tvbnow,bttvbthe 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!
1 W# D$ H; {0 P, I! w5 ?2 `the last part is 1ball vs 1ball! something like that |