I literally had 4. 1 passed away. (Before birth)
I hardly know my actual dad's side (Than my crazy uncle that isn't a creep) but I know my mom's side and my stepdad's side.
My mom's father died when I was 1, my father's father is still alive, but has had surgery on his heart a few years back, my step-father's father is still alive, but he could possibly die soon, and my step-mom's father is 80 something and spends most of his time in China with his "wife".
My mom's mom is still alive, my father's mother is still alive, my step-dad's mother died of pancreatic cancer, and my step-mom's mother died when she was 17 I think.
So, out of my 8 grandparents, 3 have died.