math challenge

Week of February 10 - 16, 1997

Get in Line, Buddy!

Four cross-country skiers - Arthur, Sam, Maria, and Cordelia - are heading north in single file.

Maria is north of Cordelia.
Arthur is south of Sam.
Cordelia is south of Arthur.
Sam is north of Maria.

In what order are these cross-country skiers moving along? Is there more than one possible configuration?

See the solutions