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# 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

Math Topic:
Probability, Counting and Combinatorics
Common Core State Standard:
S-CP.9
Difficulty:
Easy
Math Topic:
Probability, Counting and Combinatorics
Common Core State Standard:
S-CP.9
Difficulty:
Easy
Math Topic:
Probability, Counting and Combinatorics
Common Core State Standard:
S-CP.9
Difficulty:
Easy
Math Topic:
Sequences, Series and Patterns
Common Core State Standard:
F-BF.2
Difficulty:
Medium
Math Topic:
Algebraic Expressions and Equations
Common Core State Standard:
8.EE.8
Difficulty:
Medium
Math Topic:
Algebraic Expressions and Equations
Common Core State Standard:
6.EE.9, 8.EE.8
Difficulty:
Medium
Math Topic:
Probability, Counting and Combinatorics
Common Core State Standard:
S-CP.9, SMP
Difficulty:
Medium
Math Topic:
Probability, Counting and Combinatorics
Common Core State Standard:
S-CP.9, SMP
Difficulty:
Medium
Math Topic:
Measurement, Probability, Counting and Combinatorics
Common Core State Standard:
S-CP.9
Difficulty:
Easy
Math Topic:
Probability, Counting and Combinatorics
Common Core State Standard:
S-CP.9
Difficulty:
Difficult
Math Topic:
Plane Geometry
Common Core State Standard:
7.G.5, G-SRT.6
Difficulty:
Medium
Math Topic:
Sequences, Series and Patterns
Common Core State Standard:
F-BF.2
Difficulty:
Difficult
Math Topic:
Sequences, Series and Patterns
Common Core State Standard:
F-BF.2
Difficulty:
Difficult
Math Topic:
Algebraic Expressions and Equations
Common Core State Standard:
A-CED.1
Difficulty:
Medium
Math Topic:
Plane Geometry, Proportional Reasoning
Common Core State Standard:
7.G.4
Difficulty:
Medium
Math Topic:
Sequences, Series and Patterns
Common Core State Standard:
F-BF.2
Difficulty:
Medium
Math Topic:
Number Theory, Probability, Counting and Combinatorics
Common Core State Standard:
S-CP.9
Difficulty:
Medium
Math Topic:
Algebraic Expressions and Equations, Number Theory
Common Core State Standard:
SMP
Difficulty:
Difficult