From Adam to Noah-The Numbers Game: Why the Genealogy Puzzles of Genesis 5 and 11 Are in the Bible

From Adam to Noah-The
Numbers Game, shows that the genealogy of Adam in Genesis 5 is a puzzle. Genesis 5 reports that people lived for over 900 years.Where are the clues that the genealogy of Genesis 5 is a puzzle?Here's the first:

1×56 years:
Lamech's birth to Adam's death

2×56 + 1 years:
Lamech's birth to Enoch's disappearance

3×56 years:
Lamech's birth to Seth's death

Here's the second clue:

416 years:
Lamech's death to Kenan's death

416 years:
Lamech's birth to Mahalalel's death

416 years:
...