Maths Toys

You're probably looking for the Crypto Thing or prime factorisation visualisation.The rest of this site is hideously work in progress.

That said, you can go to a sample page for Random Questions, and the random questions root menu is probably my next feature.

And here's a maths formatting test:\( M= \left[ {\begin{array}{cc} 1 & 2 & 3 & 4 & 5\\ 3 & 4 & 5 & 6 & 7\\ \end{array} } \right] \). Pretty, huh?