i found the ans in 30 mins but dont know correct or not?tvb now,tvbnow,bttvb, o. Q$ C1 f2 o+ H: a& W8 z
ans is too long! but concepts are something like that:3 }- p. e, I& ?, ]& m3 _$ b5 X; f
seprate 4 groups 3 balls in one group! 公仔箱論壇$ B2 F- e6 E3 _* q/ 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!
2 G1 y! w I1 D公仔箱論壇the last part is 1ball vs 1ball! something like that |