How long did/have your grandparents live(d)?

[12th Doctor]

My mother's mother died when she was 60.

My mother's father is 81 and still alive and kicking.

As for my real father's parents, they could be dead for all I know.  Sometimes I think it would be a good idea to try to speak to them, but to be honest, I don't care enough to put myself through the hassle.  They have made no efforts to contact me.