07:45

Intersecting Semicircles!

06:43

A Problem Involving Geometric Probability!

07:43

There''s Something Interesting About This Fraction...

06:35

Some Clever Cancellations Exist in This Problem!

04:05

A Basic Two-Variable Equation! (Also an Announcement for the BPRP Contest)

05:37

Math at Berkeley Episode 1: Graphing Parametric Equations!

03:37

Adding arcTangents? (2008 AIME 1 #8)

09:31

The Inverse Factorial? (Using Stirling's Approximation!)

04:18

The Biggest Troll Question in the History of the AMC? (AMC 12A 2011 #12)

02:39

Combinatorics and a Spider! (AMC 12 2001 #16)

04:16

Single Variable Madness Episode 13: What Does This Series Equal?

03:33

Single Variable Madness Episode 12: Rewrite the Integral!

03:28

Single Variable Madness Episode 11: Infinite Derivatives!

04:54

Single Variable Madness Episode 10: Introduce New Variables Into the Mix!

01:08

Speed-solving a Trigonometric Expression!

03:54

This Geometry Problem Can Be Solved in So Many Ways! (Response to Michael Penn's Video)

02:39

A Limit and an Integral In The Same Expression!

05:54

Use the Contrapositive For This Proof!

02:56

Taking the Factorial Over and Over and Over! (AIME 2003 #1)

06:01

Which Numbers Satisfy This Equation?

06:43

A Basic Counting Problem! (AIME II 2006 Problem 7)

05:21

Single Variable Madness Episode 9: Get Rid of the Logarithms!

07:45

An Expression That Never Ends! (Putnam 1995 Question B4)

05:12

This Logarithm Question is Simpler Than it Looks!

04:56

Single Variable Madness Episode 8: A Clever Factorization!

07:28

How Many Combinations Are in a Megaminx?

06:18

This Infinite Trigonometric Equation is Easier Than it Looks!

06:08

Which Value is Larger?

03:23

Use Symmetry To Solve This Problem!

02:47

Single Variable Madness Episode 7: A Logarithm in the Exponent?

02:52

The Math Behind Hisoka's Magic Trick!

03:44

Single Variable Madness Episode 6: Introduce a New Variable!

02:24

An Equation That Estimates the Square Root of a Number!

03:20

An Interesting Derivative!

06:53

Single Variable Madness Episode 5: Integer Inputs and Outputs!

11:08

Using Coordinate Geometry to Solve This Problem!

05:42

A Basic Telescoping Series!

06:32

Using Newton's Sums to Solve an Expression!

02:07

Substitution Makes This Question Easy!

01:53

A Basic Proof by Contradiction

00:47

A Strange Fact About the Number 2021!

03:58

The Sum of Factorials in an Equation!

04:01

Single Variable Madness Episode 4: Utilizing Pascal's Triangle!

05:16

A Tricky System of Equations! (AMC 12B 2013 #17)

05:29

A Simple Combinatorics Problem! (1989 Aime #2)

07:43

Every Odd Integer is The Difference of Two Perfect Squares!

05:55

Solving Michael Penn's Problem With the Am-Gm Inequality!

07:16

A Wacky Looking Integral!

04:11

Deriving the Quadratic Formula!

04:39

Single Variable Madness Episode 3: Don't Just Plug it in!

07:45

Single Variable Madness Episode 2: More Exponent Variables!

08:14

Single Variable Madness Episode 1: A Variable Exponent!

09:44

A Basic Diophantine Equation!

01:00

Solving a Standard Contest Logarithm Problem in Less Than A Minute! (AMC 12A 2018 14)

09:28

Logarithms, Logarithms, Logarithms! (AMC 12B 2013 #22)

07:39

This Contest Problem is Easier Than It Looks! (AMC 12B 2014 #15)

06:08

The Shoelace Theorem, an Important Formula For Contest Math!

09:52

Complex Roots for Days! (AMC 12B 2020 #17)

07:15

How to Prime Factorize Factorials!

05:26

The Easiest "Final Five" AMC 12 Math Question Yet? (2003 AMC 12A #24)