Compete

Math

ARML

American Regions Mathematics League

Fifteen-student regional teams competing in relays and a power round over one intense weekend.

Run by American Regions Mathematics League

Key facts

Eligible grades
Grade 12 or below during the school year of the competition. Students may not have graduated from high school in a prior academic year. There is no lower grade limit. not yet checked against the official source
Source note: the only reference found for this was a third-party listing or encyclopedia, not the organiser. Eligibility must come from the organiser, so this is marked unconfirmed until a first-party page confirms it.
Source, checked 2026-09-02
Recommended preparation
Comfort with olympiad-style problems, and a place on a regional team
Why: Teams are assembled by regional selection rather than open entry, and rounds include a proof-oriented Power Question and relay formats where one student's answer feeds the next.
Based on the published qualification route.
The organiser publishes this as part of how you qualify or enter, so it is a real condition rather than our suggestion.
Eligible ages
Not confirmed. This organiser may set eligibility by grade rather than age. We do not convert one into the other.
ARML publishes both a grade condition and an age condition. One regional organiser notes there is no lower age limit, though a guardian may be required to accompany very young students on the trip. Source note: the only reference found for this was a third-party listing or encyclopedia, not the organiser. Eligibility must come from the organiser, so this is marked unconfirmed until a first-party page confirms it.
Source, checked 2026-09-02
Individual or team
Team · Exactly 15 members plus two adult coaches. Each team must draw its students from a well-defined geographic area, and no two teams may draw from overlapping areas.
Where it runs
In person · United States, International
Entry cost
Varies by team, typically a few hundred dollars including travelThe only official figures found are from an older ARML FAQ and should not be treated as current: $400 per team plus room and board at the competition, quoted at $65 per person in 2011, with an extra night at $25. One provision is worth asking about: the FAQ states the $400 registration fee is WAIVED for a team that has not participated in the past three ARML contests, which includes teams entirely new to ARML. Coaches must pay all team fees before the competition starts.
Registration deadline
Set locally, not published as a single national date Set by each regional team's coach, well before the June competition. Contact your regional organiser in the winter or early spring.
Competition dates
Held in June, on the first Saturday after Memorial Day, simultaneously at multiple university sites. Recent sites include the University of Iowa, Penn State, the University of Nevada Reno, Western Carolina University and Saint Anselm College. A separate ARML Local competition runs in April.
Difficulty
Highly competitiveNational-level field. Expect months of structured work, and usually a coach or a strong team.
Prizes
Trophies and national team rankingsTeam and individual awards and certificates; no cash prize schedule was found on the pages checked.

What ARML is

ARML is the premier team mathematics competition in the United States. Teams of fifteen students represent a state, region or city and travel to one of several simultaneous sites for a weekend of team, individual, relay and power rounds. The relay format, where one student's answer becomes the next student's input, is unlike anything else in competitive mathematics and produces the most memorable moments in the sport.

How the competition works

Several rounds: a Team Round, a proof-oriented Power Question, an Individual Round, two Relay Rounds where one contestant's answer feeds the next student's problem, and a Super Relay. Calculators have been banned since the 2009 contest.

Eligibility notes

Selection is by your regional team, not by ARML. Some regions run open tryouts, others select from state competition results.

How to register

  1. Find your regional or state ARML team. The official site lists participating teams and contacts.
  2. Contact the team coach about tryouts. Most select in spring based on a local exam or on state competition results.
  3. If no team exists in your area, ask a nearby team whether they accept out-of-region students, or talk to a teacher about founding one.
  4. Once selected, your team handles ARML registration and travel.

Register on the official site

What skills you need

  • Olympiad-level problem solving
  • Proof writing for the Power Round
  • Team coordination
  • Composure in relay chains
  • Speed

How to prepare

ARML preparation is team practice. Individual strength gets you onto the team; team habits win rounds. The Power Round in particular is unlike any other contest round and needs deliberate practice in writing mathematics that another person can grade.

What to study

AIME-and-above problem solving
The Individual and Team Rounds sit at roughly AIME difficulty, sometimes above.
Proof writing
The Power Round is graded on written reasoning. Practise writing complete, readable arguments, not just answers.
Relay strategy
In relays, an error propagates. Teams practise passing answers with confidence signals and building in redundancy.
Team division of labour
Fifteen students and ten problems means assignment strategy is a real skill.

Full preparation guide, including a week-by-week plan

Recommended resources

Past problems and materials

Only materials the organiser or an authorised archive publishes openly are listed here.

  • ARML past contests

    ARML publishes past competitions; some years are sold as books through the organisation.

Frequently asked questions

Can I enter ARML as an individual?

No. ARML is competed by fifteen-student regional teams. You must join an existing team, which normally means passing local tryouts in the spring.

What if there is no ARML team near me?

Contact the nearest team and ask whether they accept students from outside their core area; several do. The ARML site lists teams and contacts. Some regions also run second or third teams that are less selective.

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