i found the ans in 30 mins but dont know correct or not?tvb now,tvbnow,bttvb, O {, X3 R1 Z# X7 m+ ~. P
ans is too long! but concepts are something like that:
. c' Q2 E% R! o, X' h1 q1 d# zseprate 4 groups 3 balls in one group! tvb now,tvbnow,bttvb- Q# H t x9 \8 G7 m, n
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!tvb now,tvbnow,bttvb) b# t: c: d5 S
the last part is 1ball vs 1ball! something like that |