Răspuns :
a)393,396,399,402,405,408,411.
b)681,677,673,669,665,661,657.
c)123,321,234,432,345,543,456,654.
d)207,217,227,238,247,257,267.
b)681,677,673,669,665,661,657.
c)123,321,234,432,345,543,456,654.
d)207,217,227,238,247,257,267.