Infinity Drill for Competition Math

∞ Competition Math Drill

• Problems, including Number Theory, Combinatorics, Plane Geometry, and Algebra, are regularly updated, and solutions are posted during the week.
• Problems are regularly updated, and answer can easily be checked by choosing one of the five buttons.
• The "level" of each question shows its difficulty.
• If you reach the last problem, you can see how many questions you get right during your drill.