[a fool in paradise]

"Cause I hadn't taken chemistry or physics yet and there were a bunch of questions on that, so I guess I'm a good guesser," she explained.

Educated guesses or just lucky?

[Harmless Teddy Bear]

If you know basic science and can think logically you can work your way through most of the questions. Or at least you could way back in the dark ages when I was taking the test. You can generally eliminate one of the answers just by reading carefully.