CLEP in 2 weeks, am I ready?

[ticcup]

I need 3 CLEP tests with a score of 50+ to meet entry requirements for a European university. I have to take the biology one, and have chosen college math and analysing literature for the other 2. To take the CLEP, I have to fly to another country, so I need to be confident that I can pass before I go.

I made As in AP biology, calculus and English, and did well on the SAT and SAT biology/math subject tests.. but that was 12 years ago, so I'm a little nervous!

I've taken the Peterson's practice tests, with the following scores:
Lit: 75 80 80 (I disagreed with some of the interpretations on these tests, is the CLEP so vague?)
Math: 75 58 78
Bio: 84 83 69

I know functions/algebra well, but am having some trouble with logic and more complicated probability. I also took the College Board math test in the official guide and got 50/60, it seemed very different from the Peterson's tests.

I know there's no guarantee, but can I be fairly confident of passing these 3 tests, 2 weeks from now?

Should I just focus hard on biology (it's necessary for the degree I'm applying to) and hope I can slide by with 50+ in the other 2? Is there another easy-ish test I could cram for as backup, or take cold?

ETA: Also, in what order would you recommend taking the tests? I have to do all 3 back to back in the same evening.