I'm finishing high-school in December at the ripe age of 23 (better late than never :P) and I have taken an interest in both physics and mathematics, although especially mathematics. I want to study mathematical physics abroad and I was wondering if my Icelandic credentials are good enough.

I know high-school mathematics all the way through calculus (learned a lot of proofs on my own). I have also learned all the physics and chemistry that you can find on Khan Academy.

Is that enough to start a B.sc. degree in mathematical physics?