I never thought about it but I mentioned to someone how old my grandparents would be if the were alive and it blew their mind . My mom's parents were born over a 100 years ago. Her dad was born in 1909 and her mom in 1914. On my dad's side my grandfather was born in 1920 and my grandma 1926. Both still alive. 

Any ways thought that was interesting. I'm 31 by the way.

My Mom's parents