• Timeline
• Countries
• Results
• Search
• Problems
• Hall of fame
• About IMO
• Links and Resources

de en es fr ru

◄ Portugal ►

22^nd IMO 1981 ►

E-mail: Kirsten Rosenkilde (Secretary general of the IMO Board)  •   Webmaster: webmaster@imo-official.org   •   Copyright © 2006 International Mathematical Olympiad. All rights reserved.