Videos
Practice
AMC 10/12
2021 AIME I #3
New!
Using Integral Powers of 2, we put Number Theory in action.
2021 AIME I #2
New!
Use Similar Triangles and a dash of Areas to figure this one out.
2021 AIME I #1
New!
This is a dynamic state problem with probabilities.
2010 AMC 10A #7
We find the distance traveled by a path using right triangles.
2010 AMC 10A #6
We define a "Clover" Operation and use it recursively
2010 AMC 10A #5
Find the area based on circumference
2010 AMC 10A #4
A Division Word Problem about Audiobooks.
2010 AMC 10A #2 & #3
Solving word problems and a simple geometry.
2010 AIME I #1
Probability of square from list of divisors.
2010 AMC 10A #1
Finding average of a list.