What is the DMI?

The DMI is a competitive math contest hosted by Stuyvesant High School. Any team in a high school within the five boroughs of New York City can participate. It's completely free, due to our sponsors! Look below for more information on registration, location, rules, and schedule. 

Consent Form

All participating students must have their parents complete this consent form:
Please fill out the updated form above if you completed the form before December 2nd.

Location for the Rounds

All rounds will take place in one of three locations: Auditorium, Cafeteria, or Library

Lunch will be eaten in the cafeteria.


Teams should plan to arrive at 8:00am. All participants should enter through the main entrance at 345 Chambers Street. Since it is the weekend, it is important to take into account service changes for the subways in order to arrive on time.

Contest Information


This contest is open to teams from any high school within the five boroughs of New York City, private or public. Students must be in grades 9-12 to participate. Each school is guaranteed 1 team slot and may request up to 3 teams which will be distributed depending on available space. Also, teams may optionally bring 2 alternates. The alternates will form teams with alternates from other schools.

Size of teams

Teams will consist of 6 students, all from the same school. Partial teams are allowed, but they will be at a disadvantage as part of a team's total score is the sum of the individual scores.


None! The contest is absolutely free, thanks to the support of our sponsors.


No calculators or electronic devices are allowed. Students who are learners of English may use a paper dictionary. Full rules are available here.


See this document regarding some mathematical ideas used in this contest as well as conventions regarding the form of answers.


The format of the contest is a mini-ARML contest, with a few changes.


8:00am - 8:30am - Registration of Teams

8:30am - 8:45am - Introduction and Contest Orientation (Auditorium)

8:45am - 9:35am - Team Round

Each six student team will have 40 minutes to answer 10 questions.

9:45am - 11:00am - Power Round

After a 10 minute reading period, each six student team will have 60 minutes to complete a series of calculations and proofs.

11:00am - 11:45am - Lunch in Cafeteria

11:55am - 1:15pm - Individual Round

There will be five 10 minute rounds consisting of two questions for each round to be answered by students individually.

1:25pm - 2:40pm - Marathon Round

Each team of 6 will work on two questions at a time as a team. Scores will be updated live throughout the round.

2:50pm - 3:30pm - Tie-Breakers & Awards Ceremony