Determinați numerele care lipsesc din spațiile punctate

a). 5,15,25,35,45,55
b). 7,14,21,28,35,42
c). 15,30,90,360,1800,10800
d).122,3124,5306,7568, 99010,1113212
e). 122,3412,4520,5636,6742,7856
f). 3,4,12,48,576,27648,15925248