You can
put this solution on YOUR website! Can a person born in 1926 have grandparents who married in 1885?
The grandmother could have borne a daughter in 1886. That
daughter would have been 20 years old in 1906, and could
have borne a daughter then. Then THAT daughter would have
been 20 years old in 1926 and borne a child. So the
answer is yes.
Edwin