- How to calculate a square root by hand
- How to solve 1st, 2nd, 3rd and 4th degree equations
- How does RSA work
- How to implement calculations using shifts
- regular polytopes
- more regular shapes
- applet attempting to project 4d objects to a plane.
- volumes
- geometric functions
- Elementary algebra
- Elementary analysis
- Elementary geometry
- summary of some number theoretical terminology
- How long can I wait before starting a project?
- efficient method of iterating through primes
- about the ackerman function
- about leastsquares fitting
- about the '196' problem
- about fixed point calculations
- solving rubik's cube
- perl script demonstrating the quiz-switching problem
- extended version of gnu arbitrary precision calculator