It's technically ten but people get confused when I say "O S Ten" so I usually just say "O S Ex."
Just watch the latest keynote: around min 21 ...
I understand that it's ten, but I never ever pronounce it anything other than ex.
So for the people who say OS Ex -
Does that mean the upcoming superbowl is going to be:
Suoer Bowl Ex El Vee Eye Eye Eye???!!??