- General Math
- Sequences, Series and Patterns
- Number Theory
Video by Art of Problem Solving's Richard Rusczyk.
- General Math
- Percents and Fractions
- Problem Solving (Misc.)
Kyra’s school building this year was overcrowded due to a lot of new registered students. Classroom space was a real issue. In looking ahead to next year, the administration figures that if teachers...
- Probability, Counting and Combinatorics
The distinct letters from the word MEMORIAL are used to create set Z, such that Z = {M, E, O, R, I, A, L}. The letters from the word DAY are used to create set Y, such that Y = {D, A, Y}. If set X is...