'Eighty' in the Bible

And Methuselah was a hundred and eighty-seven years old when he became the father of Lamech:

And after the birth of Lamech, Methuselah went on living for seven hundred and eighty-two years, and had sons and daughters:

And Lamech was a hundred and eighty-two years old when he had a son:

Abram was eighty-six years old when Hagar gave birth to Ishmael.

And Isaac was a hundred and eighty years old.