How many people can do a simple sudoku?

I know that pretty much everyone knows what a Sudoku is, but how long would it take you to complete one? This one took me only three minutes and thirty seconds. Try it out and tell me how long it takes you!

http://show.websudoku.com/

First post for Mathematics

This is the first post for the OFI blog in math. You may post anything math related from the complex equations of the infinite series to the simple addition of ten plus two. Feel free to comment, add, or give your thoughts of anything related to math.

- Lee