Problems
IChO 2025 Exam Problems
The IChO 2025 exam problems, solutions, and translations will be available for download on this page after the competition concludes in July 2025.
Following the event, the below materials will be available:
- Official English versions of the theoretical and practical problems and solutions (PDFs)
- Translations of the theoretical and practical exams by participating delegations (zip files, organized alphabetically by country code ISO-3).
Preparatory Problems
Mentors
The IChO 2025 Preparatory Problems, along with their solutions, have been released via Olympify to mentors for reading and translation.
If any country mentors are not able to access the problems via Olympify, please contact us on: info@icho2025.ae.
Others
You can access just the questions from below.
Theory Prep Problems - Version 1.0 (31-January), Version 2.0 (14-April), Version 3.0 (10-June)
Experiment Prep Problems - Version 1.0 (31-January), Version 2.0 (14-April), Version 3.0 (10-June)
Solutions to Prep Problems (Theory and Practical)
