I used to know them all. (Had to memorize them as a child, under pain of pain. Ditto a number of OT verses, the which I have mostly managed to forget.) I could probably still name...9. (Wrote down what I could remember, then checked Google: 9 commandments, and nothing that wasn't a commandment.)

I missed taking the name of the lord in vain. Goddammit. :)

But I have often observed that I know quite a bit more about the Christian Bible than the sort of evangelical asswipe who usually wants to argue with me. It helps when you've actually read it.