SOLVED. YA Sci-Fi book about teens that discover they are the last of their respective races. Read mid 1980s. Spoiler.

[Karen]

I read a book in the mid-80s (it may have been older) about a group of teens that found out that they were the last of their respective races. I seem to recall that were was at least one White, one Black, and one Asian. I don’t remember if there were any others. They were living in towns of others of their “race” but came to find out that underneath their façade they were all a uniform brown color. IIRC, after finding this out, they felt like they were living in a zoo. Somehow, they all manage to come together and get on a spaceship where they begin to find out about the history of Earth. When they try to go to Earth, they discover they are already there.

[Juels]

Race Against Time by Piers Anthony?

[Julie]

Yup, I second that.

[Karen]

I think that's it. Thanks all!!