i found the ans in 30 mins but dont know correct or not?
3 G; h! p4 g/ J* t$ xans is too long! but concepts are something like that:
) C: Y {, ~3 @4 z0 \4 Y9 o公仔箱論壇seprate 4 groups 3 balls in one group!
' Y4 U, b0 G/ d, c0 N7 B* w公仔箱論壇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!5.39.217.765 g+ V8 ?+ a1 F& A* u1 {' S9 Z* c
the last part is 1ball vs 1ball! something like that |