In May 2027, the Colorado ARML Team will compete against regional teams from around the country and abroad at the ARML Competition. In 2026, thirty-one Colorado students from eleven different schools were chosen to represent the state in the team competition.
University of Nevada, Reno
June 4 to 6, 2027
Team tryouts in January 2027
Overview
ARML (the American Regions Mathematics League) is a math competition for high school students held each year in late May or early June. In 2026, the competition involved 120+ fifteen-member teams from almost every state, gathering at five sites across the country; international teams from China, Korea, the Philippines, Macao, Turkey, Colombia, and Indonesia have also participated in the past. Colorado usually sends two 15-student teams, plus a few alternates, to the Western Site in Reno, Nevada. Check out the 2026 Competition for sample problems.
Thirty to forty Colorado high school students prepare together throughout the year to represent the state at the ARML Competition. Meetings emphasize teamwork, collaborative problem solving, and student presentations of solutions. The team also holds several dedicated practices in the spring to get used to the competition format and build teamwork among students who may come from different schools and not otherwise know each other.
The contest itself has four rounds: a team round, where the team works together to solve 10 problems in 20 minutes; a power round, where the team solves a multi-part, proof-based problem set in 60 minutes; an individual round, where students solve 10 problems on their own, administered in 5 pairs with 10 minutes per pair; and a relay round, where three students in a row solve a chain of three problems in 6 minutes, passing answers (but no other information) to the next student. See the Contest Format tab above for detailed rules on each round.
Colorado has competed in ARML since 2006 and has had a number of students and teams with impressive results over the years. The Colorado team has won national honors in the B division six times, including first place in 2023, 2021, and 2006. Colorado students have ranked among the top ten individuals in six different years.
Click to see Colorado ARML Team photos from past years.
Individual high scorers in previous ARML competitions have included Jackson Dryg who placed 19th overall in 2024 and placed 9th among all off-site participants in 2022; Srinivas Arun, who received one of only 6 perfect scores in 2021; Austen Mazenko, who placed 5th overall in 2019; Hongyi Chen, who placed 12th in 2016; Ben Alpert, who placed 6th in 2011; Thomas Davids, who placed 9th in 2008; and Sam Elder, who placed 9th in 2007. Other individuals who have qualified for the tiebreaker round include Shruti Arun and Rohith Thomas in 2025, Austen Mazenko in 2018, Rahul Thomas in 2017, Hongyi Chen in 2014 and 2017, Avi Swartz and Jesse Zhang in 2015, and Hannah Alpert in 2007.
ARML Contest Format
Team Round
The team will have 20 minutes to work together on 10 problems, each worth 5 points.
Power Question
This problem, broken into a sequence of mini-problems, is a theoretical exercise requiring the writing of mathematical proofs. The team will have 60 minutes to write complete solutions, worth up to 50 points.
Individual Questions
There will be 10 individual questions, administered in pairs, with a 10-minute time limit for each pair. Each individual question is worth one point, for a maximum of 150 points per team.
Relay Round
Each team of fifteen will be split into five three-person Relay teams. Each Relay team will compete in two Relay Rounds. On each Relay, 5 points will be awarded to each Relay team that correctly completes the Relay within 3 minutes, and 3 points will be awarded for a correct answer within 6 minutes. Only the last answer submitted by each Relay team will be counted. A total of 50 points is available to each team on the Relay Round.
Each Relay team member will receive a different problem. TNYWR stands for the number you will receive. When the first person solves his (or her) problem, he writes the answer on a piece of paper and passes it to the second person. The second person needs that number to solve his problem (the number is referred to as “the number you will receive,” or TNYWR). When the second person comes up with an answer, he passes that number to the third person. When the third person gets an answer, he writes it on an official answer slip, and that slip will get handed in. The third person of each group should take all the official slips and fill in the complete team information on each.
The second and third persons can usually do most of their work before getting a number from the person ahead of them. Nothing may be passed except a number—NO COMMENTS, NO OTHER INFORMATION. You should double underline the answer you pass in case it accidentally gets turned upside down and looks like a different number. You may continue to pass answers, even if they are the same as before. NOTHING MAY BE PASSED FORWARD. IF YOU RECEIVE AN ANSWER THAT IS IMPOSSIBLE FOR YOU TO USE, JUST WAIT AND HOPE THAT A DIFFERENT ANSWER WILL GET PASSED TO YOU!
The third person may hand in an answer only at the 3-minute mark and at the 6-minute mark. If the answer handed in at 3 minutes is correct, and no answer is handed in later, it gets maximum points. If any answer is handed in at 6 minutes, the previous answer is discarded by the proctor (even if the number is the same as before!), and you can get only the lower number of points, provided the answer is correct. OBVIOUSLY THE THIRD PERSON SHOULD NOT HAND IN THE SAME ANSWER A SECOND TIME! The announcer will give a 15 second warning before the 3-minute and 6-minute time limits. If you are handing in an answer then, put it on the appropriate answer slip, hold that slip up, and the proctor will collect it.
Tryouts
Team tryouts take place in January and consist of a set of problems taken individually during one of our regular meetings. Two fifteen-member teams (plus a few alternates) are selected to represent Colorado at the national ARML competition.
Many factors go into team selection, including tryout results, past contest performance, previous ARML experience, grade level, and math circle participation. Team members typically rank among the top students in the state on the AIME and AMC contests. Minimum background: Algebra II/Trigonometry.
All prospective team members are required to take the tryout.
Trip Logistics
For the competition, the team flies together to Reno, Nevada to compete at the Western Site. We meet at Denver International Airport (DIA) on Friday morning of competition weekend and arrive in Reno around midday. The first two rounds of the competition take place Friday evening.
The remaining rounds and an awards ceremony take place on Saturday. Saturday evening features a fun event organized by the host team. We depart from Reno on Sunday morning and arrive back at DIA around midday.
We rely on several parent chaperones for the trip. Chaperones help with everything from guiding groups of students through the airport to proctoring or grading competition rounds. Past chaperones have enjoyed the trip and remarked that it's fun to experience the competition and see what the students do over the weekend. If you're interested in chaperoning, please contact us.
Cost
The cost for the trip for Colorado ARML Team members depends on several factors, including airfare to Reno and the contest fees, room, and board charged by ARML. Payment for the trip is collected in two parts.
The first payment, covering airfare, is due shortly after tryout results are announced. The second payment, covering everything else (registration, lodging, meals, and other costs), is due at our meeting in May. We split payment this way because airfare is booked shortly after tryouts to secure a reasonable price and guarantee space for the team, but ARML does not release its final costs until May, so the second payment depends on the amount ARML announces. In 2026, the total cost was $765 per student ($470 for airfare and $295 for other costs). Please note that the cost for the 2027 trip may be higher.
Colorado ARML FAQ
Can middle school students join the team?
Middle schoolers are welcome to try out, but it is rare for middle school students to join the ARML team. Middle school students are usually only invited if their skills are on par with the top high school students; otherwise, we ask them to wait until high school to join the team. If a middle school student is selected for the team, we ask at least one of their parents to come along as a chaperone.
I was selected as an alternate. What does that mean?
Alternates are full members of the Colorado team: they practice with and travel with the team. If another team member is unable to participate in the competition, an alternate will take their place. Otherwise, the alternates compete together on a team of alternates from other regions at the Western Site. This team participates in all of the rounds and is scored like any other team — it's a fun way to experience the competition and get to know students from other regions.
When and where will meetings take place?
Practice sessions will be held on the CU Boulder campus. See the meeting schedule for dates and times.
After team tryouts we have seven Euler Group meetings. We'll spend most of this time practicing and preparing for the trip. We ask that team members attend as many of these meetings as possible, with a minimum requirement of five. ARML is a team competition and it's important for team members to practice working together and get to know one another. Students who live more than 2 hours from Boulder are excused from this requirement.
What is the ARML Power Contest?
The ARML Power Contest is a two-round team competition that takes place during the school year. It is similar to the Power Round of the ARML Competition. Any Colorado student is welcome to participate. See the meeting schedule for dates and times. The math circle ranked among the top seven teams for ten consecutive years and won first place in 2016.
What if I can't make the trip to ARML? Can I come to the meetings anyway?
Yes. You're welcome to join us to work on challenging math problems.
Who will be leading the ARML practice sessions?
Directors Thomas Davids and Silva Chang will be coaching the Colorado ARML Team.
How do I join?
The best way is to fill out a registration form, then come to the next math circle meeting.
2026 Colorado ARML Rosters
| 2026 Colorado Team 1 | |
|---|---|
| Hanbei Bao | Fairview HS |
| Sophia Dai | Lakewood HS |
| Allison Duan | Peak to Peak Charter School |
| Johnlin Feng | Fossil Ridge HS |
| Aarush Goradia | Cherry Creek HS |
| Kaylor Huang | Fairview HS |
| Joshua Liu | Cherry Creek HS |
| Neo Luo | Fossil Ridge HS |
| Rohith Thomas | Cherry Creek HS |
| Alex Wang | Fossil Ridge HS |
| Jonah Wang | Fairview HS |
| Kevin Yang | Fairview HS |
| Derek Yin | Fairview HS |
| Alex Zhang | Ralston Valley HS |
| Christopher Zhu | Cherry Creek HS |
| 2026 Colorado Team 2 | |
|---|---|
| Nathan Daggy | Northglenn HS |
| Jasper Huang | Cherry Creek HS |
| Om Khurana | Cherry Creek HS |
| Katherine Ning | Cherry Creek HS |
| Alexander Oh | Cherry Creek HS |
| Agastya Prabhu | Cherry Creek HS |
| Arnav Rohilla | Cherry Creek HS |
| Aanshi Shah | Legacy HS |
| Helen Wan | Pine Creek HS |
| Ivy Wang | Fairview HS |
| Leran Wang | Cherry Creek HS |
| Osel Yeh | Fairview HS |
| Allan Yu | Fairview HS |
| Andrew Zhao | D'Evelyn Jr/Sr HS |
| Kyle Zhu | Stargate School |
| 2026 Colorado Team Alternates | |
|---|---|
| Arnav Sharma | Cherry Creek HS |
ARML Resources
Additional ARML resources can be found in the Members section. Email us for the password.