American Regions Mathematics League

[2] ARML problems cover a wide variety of mathematical topics including algebra, geometry, number theory, combinatorics, probability, and inequalities.

ARML problems are harder than most high school mathematics competitions.

Contest supporters are the American Mathematical Society, Mu Alpha Theta (the National Mathematics Honor Society for High School and Two-Year College students), Star League, Penguin Books, and Princeton University Press.

At the end, there is a set of tiebreaker questions to determine the top 20 participants, who receive cash prizes from D. E. Shaw & Co. Each student tied for the highest score (or the highest two scores if there are fewer than 20 tied with the top score) is given up to three tiebreaker questions, one at a time, with the goal of answering correctly as quickly as possible.

Also in recent years, a song contest has become an informal event at ARML.

A team from Massachusetts asked to participate in the 1974 NYSML competition, and it took first place.

When the Atlantic Regions Mathematics League was founded, the competition was held at a single eastern site that changed from year to year: After 1983, the coordinators decided to keep the competition at Penn State University.