## A Geometrical Diversion

The diagonals of a square meet at O.

The bisector of angle OAB meets

BO and BC at N and P respectively.

The length of NO is 24.

How long is PC?

View the solution

Evaluate This Indefinite Integral

Interesting Integer Sequences

# 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