• Participating students: Grades 1–12
• Exam format: Written or online (students may log in to the Math League online system to participate in the preliminary round).
• Online exam date and time (students may log in to the Math League online system to participate in the preliminary round):
  
  • Grades 1-2: Saturday, December 12, 2026, 1:30 PM - 2:15 PM
  • Grades 3-4: Saturday, December 12, 2026, 1:30 PM - 2:45 PM
  • Grade 5: Saturday, December 12, 2026, 11:00 AM - 12:15 PM
  • Grade 6: Saturday, December 12, 2026, 9:00 AM - 10:15 AM
  • Grades 7-12: Saturday, December 12, 2026, 11:00 AM - 12:15 PM
• Written test date and time:
  
  • Grades 1-2: Saturday, December 12, 2026, 9:00 AM - 9:45 AM
  • Grades 3-5: Saturday, December 12, 2026, 11:00 AM - 12:15 PM
  • Grade 6: Saturday, December 12, 2026, 9:00 AM - 10:15 AM
  • Grades 7-12: Saturday, December 12, 2026, 11:00 AM - 12:15 PM

Students who plan to participate in the 2027 Math League Finals and Summer Tournament must first participate in the preliminary round.

• The Grade 1 test consists of approximately 50 multiple-choice questions and has a time limit of 45 minutes.
  Study Materials for the Grade 1 Preliminary Round:
  • Past Contest Questions (3 sets): Includes official questions, answers, and solutions from the Grade 1 Preliminary Round contests held from 2023 through 2025, for a total of 3 sets.
  • Practice Questions (5 sets): Includes 5 sets of practice questions, with a total of 225 questions.


• The Grade 2 test consists of approximately 50 multiple-choice questions and has a time limit of 45 minutes.
  Study Materials for the Grade 2 Preliminary Round:
  • Past Contest Questions (3 sets): Includes official questions, answers, and solutions from the Grade 2 Preliminary Round contests held from 2023 through 2025, for a total of 3 sets.
  • Practice Questions (5 sets): Includes 5 sets of practice questions, with a total of 225 questions.


• The Grade 3 test consists of approximately 40 multiple-choice or fill-in-the-blank questions and has a time limit of 75 minutes.
  Study Materials for the Grade 3 Preliminary Round:
  • Past Contest Questions (13 sets): Includes official questions, answers, and solutions from the Grade 3 Preliminary Round contests held from 2013 through 2025, for a total of 13 sets.
  • Video Explanations of Past Contest Questions (10 sets): Includes video explanations of solution strategies for Grade 3 Preliminary Round questions from 2013–2015 and 2017–2023. The videos were recorded by professors affiliated with the Math League Organizing Committee and can be replayed as many times as needed.


• The Grade 4 test consists of approximately 40 multiple-choice or fill-in-the-blank questions and has a time limit of 75 minutes.
  Study Materials for the Grade 4 Preliminary Round:
  • Past Contest Questions (13 sets): Includes official questions, answers, and solutions from the Grade 4 Preliminary Round contests held from 2013 through 2025, for a total of 13 sets.
  • Video Explanations of Past Contest Questions (11 sets): Includes video explanations of solution strategies for Grade 4 Preliminary Round questions from 2013–2023. The videos were recorded by professors affiliated with the Math League Organizing Committee and can be replayed as many times as needed.


• The Grade 5 test consists of approximately 40 multiple-choice or fill-in-the-blank questions and has a time limit of 75 minutes.
  Study Materials for the Grade 5 Preliminary Round:
  • Past Contest Questions (13 sets): Includes official questions, answers, and solutions from the Grade 5 Preliminary Round contests held from 2013 through 2025, for a total of 13 sets.
  • Video Explanations of Past Contest Questions (11 sets): Includes video explanations of solution strategies for Grade 5 Preliminary Round questions from 2013–2023. The videos were recorded by professors affiliated with the Math League Organizing Committee and can be replayed as many times as needed.


• The Grade 6 test consists of approximately 40 multiple-choice or fill-in-the-blank questions and has a time limit of 75 minutes.
  Study Materials for the Grade 6 Preliminary Round:
  • Past Contest Questions (13 sets): Includes official questions, answers, and solutions from the Grade 6 Preliminary Round contests held from 2013 through 2025, for a total of 13 sets.
  • Video Explanations of Past Contest Questions (11 sets): Includes video explanations of solution strategies for Grade 6 Preliminary Round questions from 2013–2023. The videos were recorded by professors affiliated with the Math League Organizing Committee and can be replayed as many times as needed.


• The Grade 7 test consists of approximately 40 multiple-choice or fill-in-the-blank questions and has a time limit of 75 minutes.
  Study Materials for the Grade 6 Preliminary Round:
  • Past Contest Questions (13 sets): Includes official questions, answers, and solutions from the Grade 7 Preliminary Round contests held from 2013 through 2025, for a total of 13 sets.
  • Video Explanations of Past Contest Questions (7 sets): Includes video explanations of solution strategies for Grade 7 Preliminary Round questions from 2017–2023. The videos were recorded by professors affiliated with the Math League Organizing Committee and can be replayed as many times as needed.


• The test for Grades 8–9 consists of approximately 40 multiple-choice or fill-in-the-blank questions and has a time limit of 75 minutes.
  Study Materials for the Grades 8-9 Preliminary Round:
  • Past Contest Questions (13 sets): Includes official questions, answers, and solutions from the Grades 8-9 Preliminary Round contests held from 2013 through 2025, for a total of 13 sets.
  • Video Explanations of Past Contest Questions (5 sets): Includes video explanations of solution strategies for Grades 8-9 Preliminary Round questions from 2017–2021. The videos were recorded by professors affiliated with the Math League Organizing Committee and can be replayed as many times as needed.


• The test for Grades 10–12 consists of approximately 40 multiple-choice or fill-in-the-blank questions and has a time limit of 75 minutes.
  Study Materials for the Grades 10-12 Preliminary Round:
  • Past Contest Questions (13 sets): Includes official questions, answers, and solutions from the Grades 10-12 Preliminary Round contests held from 2013 through 2025, for a total of 13 sets.
  • Video Explanations of Past Contest Questions (4 sets): Includes video explanations of solution strategies for Grades 10-12 Preliminary Round questions from 2013, 2018, 2019, and 2020. The videos were recorded by professors affiliated with the Math League Organizing Committee and can be replayed as many times as needed.


• The Math League Organizing Committee reserves the right to adjust the question-setting format and procedures as needed.

• Preliminary Certificates — Certificates will be awarded proportionally based on students’ performance:
  • "Honor Roll of Distinction Certificate Top 8%": awarded to students who rank in the top 8% of their grade.
  • "Honor Roll Certificate Top 25%": awarded to students who rank in the top 25% of their grade.
  • "Certificate of Achievement Top 50%": awarded to students who rank in the top 50% of their grade.
  • "Certificate of Participation": awarded to all other participants.
• Students who win certificates in the preliminary round will receive an official certificate issued by the Math League. The list of winners will be announced on the official American website of the Math League (www.mathleague.com).
• The results of the Math League can serve as an important reference when applying to well-known high schools and universities in North America.
• Students in grades 1 to 10 who receive an "Honor Roll of Distinction Certificate — Top 8%", "Honor Roll Certificate — Top 25%", or "Certificate of Achievement — Top 50%" in the preliminary round are eligible to participate in the semi-final.
• Grades 8 and 9 use the same test paper. When determining eligibility, all students from grades 8 and 9 are ranked together by score; they are not compared separately by grade. The certificate will indicate the grade group in which the student participated. The same selection process applies to the high school group.

After the preliminary round, each participating student will receive the following analysis and targeted review materials:

• National preliminary results statistics, including a normal distribution graph of scores, average score, standard deviation, and other relevant data.
• Individual student score report, detailing whether each question was answered correctly, the knowledge points tested, and the difficulty level of each question.
• Targeted review questions (for students in grades 3–12): Custom practice questions are generated based on each student’s preliminary exam paper to help address their specific weaknesses.

• Equipment required for online activity: Students should use a laptop or tablet with a camera, as well as a smartphone with a camera and microphone, to participate in the preliminary round and answer questions online through a web browser. The entire answering process will be monitored and recorded in real time to ensure fairness and integrity. The use of any instant messaging tools (e.g., WeChat) is strictly prohibited.
• Click here to view : detailed Instructions for Participants.
• Click here to view: How the 2026–2027 Math League Preliminary Round, held online, ensures fairness and integrity (i.e., prevents cheating)?

Interested students should register through their own training institutions or schools. If your training institution or school does not organize the competition, please contact the organizing committee (see contact information below).

If you have any questions, please email us at INFO@LTHOUGHTS.COM . We will reply within two working days of receiving your message. Thank you!

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