- Probability, Counting and Combinatorics

This plan will help Mathletes to develop a strategic approach to counting the occurrences of a certain shape in a more complex figure made of multiple intersecting lines.

- Probability, Counting and Combinatorics

This plan will help Mathletes to develop a strategic approach to counting the occurrences of a certain shape in a more complex figure made of multiple intersecting lines.

- Probability, Counting and Combinatorics

This plan builds on what Mathletes already know about ratios to introduce the definition of probability as a ratio of desired outcomes to total outcomes. Mathletes will then practice calculating the...

- Probability, Counting and Combinatorics

Explore combinatorics by looking at a common type of MATHCOUNTS counting problem – counting paths between two points. End with an extension that connects counting paths to another type of combinatoric...

- Probability, Counting and Combinatorics

This plan will introduce Mathletes to The Fundamental Counting Principle – a faster method to determining the total number of possible outcomes of an event without listing them all out!

- Algebraic Expressions and Equations
- General Math

Explore the formula d = rt by starting with unit conversion problems. Mathletes will solve for distance, rate and time by paying attention to the units given in the problem and using the appropriate...

- Probability, Counting and Combinatorics

Video by Art of Problem Solving's Richard Rusczyk.

- Number Theory
- Probability, Counting and Combinatorics

Video by Art of Problem Solving's Richard Rusczyk.

- Probability, Counting and Combinatorics

Video by Art of Problem Solving's Richard Rusczyk.

- Probability, Counting and Combinatorics
- Problem Solving (Misc.)

Video by Art of Problem Solving's Richard Rusczyk.

- Probability, Counting and Combinatorics

Video by Art of Problem Solving's Richard Rusczyk.