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.