Genesis 5:6 Meaning

4And the days of Adam after he had begotten Seth were eight hundred years: and he begat sons and daughters:

5And all the days that Adam lived were nine hundred and thirty years: and he died.

6And Seth lived an hundred and five years, and begat Enos:

7And Seth lived after he begat Enos eight hundred and seven years, and begat sons and daughters:

8And all the days of Seth were nine hundred and twelve years: and he died.