A closer look at one of the simplest quantum algorithms.

Why it's hard to build quantum computers and what can be done about it.

What will quantum computers be able to do that ordinary computers can't do?

What's stopping us from building useful quantum computers? And how long until we'll have them?

Some neat number tricks using numbers read backwards.

Eleven makes multiplication easy.

The impossible becomes possible when you move into the third dimension.

A quick look at an ancient problem.