i found the ans in 30 mins but dont know correct or not?tvb now,tvbnow,bttvb) O# u0 `: Q. C. Q1 P, r+ l
ans is too long! but concepts are something like that:
: H' e- x- f5 B9 H7 k公仔箱論壇seprate 4 groups 3 balls in one group!
5 u( x/ a+ k: ~' m8 x5 X0 ]tvb 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 }0 G8 ?, O& gthe last part is 1ball vs 1ball! something like that |