i found the ans in 30 mins but dont know correct or not?
; R, A0 K# y* N0 a! itvboxnow.comans is too long! but concepts are something like that:. P1 Q& p, ?3 j
seprate 4 groups 3 balls in one group! 公仔箱論壇2 q, n0 \, z" S0 a
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 ]5 l* U+ `+ [2 E j& Dtvb now,tvbnow,bttvbthe last part is 1ball vs 1ball! something like that |