The December Contest has concluded. Solutions and results have been posted!
Results from the October, November, and December contests are on the Results page.
December Contest:
Clarification on Problem 12: The first iteration should have endpoints (0,0) & (2,0); NOT (0,0) & (0,2).
Clarification on Problem 13: the side length of the equilateral triangle is 2√3 cm.
Note: Problem 15 has been voided.
What are the ABMC Online Contests?
The ABMC Online Contests consist of three contests in October, November, and December. Each contest contains fifteen questions.
All ABMC Online Contests must be done individually.
Eligibility note: ABMC is for students in or below 8th grade only. High schoolers can take it unofficially for fun, however!
Taking the contest
No preregistration is needed. When a contest begins, problems and the submission form will be posted on this page. Just visit our website once the competition starts.
The contest will be released at 10am on Saturday and the submission form will close at 11:30pm on Sunday night.
Participation is free.
When will these contests take place?
October Contest: October 19th-20th
November Contest: November 16th-17th
December Contest: December 14th-15th
Rules
No calculators, online resources, and other computational resources are admissible.
Drawing aids, such as rulers and protractors are permissible. However, software such as GeoGebra is prohibited.
All answers are non-negative integers between 0 and 100,000.
Grading and tie-breaking
Each problem is worth 1 point.
Ties will be broken by the ‘most difficult’ problem solved. If problem A was solved by a contestants, and problem B was solved by bcontestants, with a < b, then A is more difficult than B.
For prizes and total scores, only a contestant’s two highest scores will be considered.
Will prizes be awarded?
In each grade, contestants who perform within the Top 10 within each round will have their names posted on our website. Additionally, contestants who perform within the Top 15 over all 3 contests will have their scores posted.
Top scorers of each grade will also be displayed.
Physical prizes (such as AoPS gift certificates, merchandise, calculators, etc.) will be given to top scorers if they attend the ABMC onsite contest.
