It was one of those days when everything fell into place for Peter Richards.

One May morning last year, the junior at Oak Park-River Forest High School sat down with a Scholastic Aptitude Test booklet. Three hours and about 200 questions later, he was finished.He thought he had done well.

He had no idea just how well.

Richards, 18, now a senior, recently received his SAT scores. He was one of only five students in the nation to earn a perfect 1600 score.

"I knew I could do really well," Richards said between classes Tuesday. "I wasn't sure I could have a good enough day to get everything right. But I had a great day and didn't miss any."

You might think getting a perfect score on the SAT test is the result of hours of cramming or enrolling in a test preparation course. Not for Richards. He said he studied only about five hours.

"Just knowing the stuff from school was a big factor," said Richards, ranked 14th in a class of 776. "I don't think the kids ranked above me did as well on the SATs. I'm human. I've had a couple of Bs. I just happen to be someone who takes tests well. I really don't think I put more time in than anyone else, but I do have a good memory."