# MATHCOUNTS MINIS

### A video resource created by Art of Problem Solving!

Art of Problem Solving's Richard Rusczyk, a MATHCOUNTS alumnus, has been creating MATHCOUNTS Minis videos for more than a decade! Minis provide detailed explanations for MATHCOUNTS problems and their associated math concepts, plus include activity sheets. They're great resources for math team practices or club meetings! Visit Art of Problem Solving for many more educational resources.

Great Minis for At-Home Learners
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Tangent Segments & Similar Triangles

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Turning Word Problems into Algebra Equations

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Geometry: 30-60-90 Right Triangles

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Sequences, Series and Patterns

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Using Algebra and Number Sense as Shortcuts

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Geometry: Circles and Right Triangles

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Solving Quadratic Equations Using Substitution Simplification

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Number Sense: Looking for Patterns

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More Than One Way to Solve a Problem

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Strategic Guessing Using Divisibility Rules

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Counting Paths

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Sequences and Central Tendency

Please select an option.
Math Topic:
Coordinate Geometry, Plane Geometry, Probability, Counting and Combinatorics
Common Core State Standard:
7.G.6, S-CP.9
Difficulty:
Medium
Math Topic:
Algebraic Expressions and Equations, Plane Geometry
Common Core State Standard:
G-C.2, G-SRT.6
Difficulty:
Difficult
Math Topic:
Number Theory, Sequences, Series and Patterns
Common Core State Standard:
F-BF.2
Difficulty:
Difficult
Math Topic:
Coordinate Geometry
Common Core State Standard:
6.G.3, 7.G.6
Difficulty:
Difficult
Math Topic:
Number Theory
Common Core State Standard:
S-CP.9
Difficulty:
Medium
Math Topic:
Probability, Counting and Combinatorics
Common Core State Standard:
S-CP.3, S-CP.9
Difficulty:
Easy
Math Topic:
Sequences, Series and Patterns, Statistics and Data
Common Core State Standard:
F-BF.2, S-CP.9
Difficulty:
Medium
Math Topic:
Algebraic Expressions and Equations, Plane Geometry, Problem Solving (Misc.)
Common Core State Standard:
8.G.7, G-C.2, SMP
Difficulty:
Medium
Math Topic:
Plane Geometry
Common Core State Standard:
7.G.6
Difficulty:
Medium
Math Topic:
Algebraic Expressions and Equations
Common Core State Standard:
A-SSE.2
Difficulty:
Medium
Math Topic:
Solid Geometry
Common Core State Standard:
7.G.6, G-GMD.3
Difficulty:
Difficult
Math Topic:
Sequences, Series and Patterns
Common Core State Standard:
F-BF.2
Difficulty:
Difficult
Math Topic:
Probability, Counting and Combinatorics
Common Core State Standard:
S-CP.3, S-CP.6, S-CP.9
Difficulty:
Difficult
Math Topic:
Measurement
Common Core State Standard:
S-CP.9, SMP
Difficulty:
Easy

There's no activity sheet, but we know you will enjoy this video.

It's the 100th MATHCOUNTS MINI Lesson!

We're taking a break from uploading new Mini Lessons for a while, which makes this the perfect time to dive into our collection of 100 Mini Lessons to revisit some of your favorites.