## X and Y

If XY = 10 and X

^{2}Y + XY^{2}+ X + Y = 99, find X^{2}+ Y^{2}View the solution

Parabola Intersections

Triangle On A Plane

# Understanding Coronavirus Spread

A Question and Answer session with Professor Puzzler about the math behind infection spread.

# Blogs on This Site

Reviews and book lists - books we love!

The site administrator fields questions from visitors.

Like us on Facebook to get updates about new resources