Web Directory

» A Collection of Math-Olympiad Problems
   Problem sets from international and national mathematics olympiads.
   http://cage.ugent.be/~hvernaev/olympiad.html

» International Mathematical Talent Search
   Solutions and Comments.
   http://www2.arnes.si/~ssdvbens/nsc/imts/imts0.htm

» Madras College Mathematics Department Resources
   Problems from UK Math Olympiads and a collection of training materials.
   http://www.madras.fife.sch.uk/maths/resources.html

» Mathematics Problem Solving
   Old sample problems from Putnam training sessions, by Monica Nevens (University of Ottawa).
   http://aix1.uottawa.ca/~jlevy/putnam/

» Problem Page
   Archive of problem sets and solutions from Wisconsin Mathematics, Engineering and Science Talent Search.
   http://www.math.wisc.edu/~talent/problems.html

» Problem Writing For Mathematics Competitions
   Mathematics problems for middle school and high school math competitions with topics range from algebra and geometry to probability and trigonometry.
   http://www.virtu-software.com/math/

» Prof. W. Kahan's Notes and Problems
   Large archive of problems and solutions from Professor Kahan's Putnam Problems Practice Seminar.
   http://www.cs.berkeley.edu/~wkahan/MathH90/

» Putnam Problem Solving
   Supplementary problems and related links by Byungchul Cha (Johns Hopkins University).
   http://www.mathematics.jhu.edu/bccha/Putnam/putnam-03-f.html

» Singapore International Mathematics Olympiad
   Training resources include problems and partial solutions.
   http://simo20020.tripod.com/

» Tournament of Towns at Toronto
   Contest problems and solutions for The International Mathematics Tournament of the Towns.
   http://www.math.toronto.edu/oz/turgor/archives.php

» USSR Math Olympiad, 1961-1986
   Problems without solutions.
   http://members.tripod.com/~PertselV/RusMath.html

» Union College Putnam Club
   Problem sets from weekly practice sessions.
   http://www.math.union.edu/~barbanej/putnam/putnam03/