This little nugget was found in the WT this morning, although 99.9% of people will not see it the same way I did.
"How did Noah hear about Jehovah? He no doubt learned much from his relatives. These included his father, Lamech, whose life overlapped Adam’s ,and his great-great-grandfather Jared, whose life overlapped Noah’s by 366 years."
So I guess Adam and Noah had to be the same generation as Adam's life overlapped Lamech and Jared, whose lives overlapped Noah's by centuries...not just a few years. Yep I got it. Clear as mud!