International Logic Olympiad

The International Logic Olympiad is the leading logic competition hosted annually in partnership with Stanford University to promote and
internationalize logic education. Offering high school students worldwide a chance to showcase excellence in logic and problem-solving,
the ILO attracts students from over 92 countries and regions annually.

——Abstracted from the official site of the ILO

Embracing the philosophy that “Logic is Everywhere,” the ILO’s systematic training is dedicated to:

Enhancing Admissions Competitiveness：Logic is the cornerstone of major disciplines such as Math, Computer Science, Law, and
Economics. ILO training prepares students for university entrance assessments (e.g., STEP, MAT, TSA) and standardized tests (e.g., SAT).
Constructing a Deep Thinking Framework：We guide students to move beyond fragmented thought processes, cultivating habits of
structured and profound critical thinking.
Empowering Learning & Innovation： By utilizing logic as a high-efficiency “cognitive tool,” the program accelerates the mastery of
complex knowledge and ignites innovative capabilities through deep understanding.

In 2026, the ILO will be introduced to China for the first time through ASEEDER. Professor Michael Genesereth, a Professor of Computer
Science at Stanford University, serves as the Global Academic Director. During the Final Round, he will personally mentor participants from
around the world, deeply cultivating their potential in logic, critical thinking, and mathematics.

A Global Stage for the Elite

The top 4 Champions per Division will be invited to Stanford for the Final Round.

Official Academic Resources from Stanford

including17 online modules,58 core concept lectures, and 200 specialized practice problems.

Extra Credit for Professional Skills

A significant asset for applications toComputer Science, Mathematics, Physics, Engineering, Economics, and Law in future study.

Elite School Mindset Training

Foundational training for standardized admissions assessments (e.g., MAT, TSA), paving the way to top universities.

Global Participation on a Large Scale

Global reach with participation from over 92 countries and 2,100 schools.

In Collaboration with Stanford University

The World's Premier Logic Challenge,Founded by Stanford University (USA)and Luminas.

Preliminary Round Rules

● Junior Division
* Be between the ages of 11 and 14 by April 18, 2026.
Grades：5-8
Language：Chinese & English
Time： Saturday, April 18, 10:00-11:15 AM (75mins).
Location： Online-On Campus
Format：Individual Challenge
Questions： 10 (Basic interactive questions)● Senior Division
* Be between the ages of 15 and 18 by April 25, 2026.
Grades：9-12
Language：English
Time： Saturday, April 25, 10:00-11:15 AM (75mins).
Location： Online-On Campus
Format：Individual Challenge
Questions： 15 (Advanced interactive questions)
Preliminary Round Awards (by grade)：
● Gold Award: Top 15%
● Silver Award: Top 30%
● Bronze Award: Top 45%
● Honorable Mention: Top 65%

Final Round Rules

● Junior & Senior Division
Eligibility：Top 4 scorers from each division in China form the National Team
* Based on the order of the highest to the lowest scores from the preliminary round.
Finalists Announced：First week of May.
Date：July 1-3.
Location：Stanford University, USA
Final Round Awards：
● Gold Scholars: Top 5%
● Silver Scholars: Top 10%
● Bronze Scholars: Top 15%
* Details subject to the official invitation letter of the Final Round.

Junior Division

Senior Division

A cube has the numbers 1 through 6 on its faces. The diagram shows four different views of the cube.

Question: Which number is on the face opposite the number 6?

Show Answer

Suarez is a (slowly) recovering liar.
He lies on six days of the week, but on the seventh day he always tells the truth.
One week, he made the following statements on three successive days：
Day 1: “I lie on Mondays and Tuesdays.”
Day 2: “Today, it’s Thursday. Saturday, or Sunday.”
Day 3: “I lie on Wednesdays and Fridays.”

Question: On which day does Suarez tell the truth?

Show Answer

Fee

● This does not cover accommodation, transportation, meals, and other incidental expenses.
*The Organizing Committee shall provide optional logistical support services (hereinafter referred to as “Services,” including but not limited to accommodation, transportation, and catering) for students. Official notice of the commencement of the Service opt-in period will be disseminated to students via both Short Message Service (SMS) and electronic mail (email).