What is my level?

Hi all, I am very inspired with the Khanacademy, but really don't know what level to start from.

I graduated school many years ago and now need to revoke, learn and train my math skills in a short period of time. I don't want to start with the very beginning as it will take much time and will include a lot of things I already know.

Is there any test which I can pass and get a recomendation what course to start with?

Thanks in advance, 

Anna.