Now, one of the things I believe about three types of people (the genius, the inventor, and the entrepreneur) is that they can take an ordinary occurrence and ask a brilliant question about it, (Why did that happen? How can I use that idea to make a machine? How can use that idea to make [...]

This carries on our series on solving “type 6″ equations, the quadratic equation. This week we look at the quadratic formula, invented by Joe Quadratic. Please watch both the videos below, the first explains how to use the formula and the second goes through some typical errors made with quadratic equations.

Today we carry on with the properties of the quadrilaterals: rectangles, squares and kites. Please click on the comic strip to enlarge if necessary.

Today, we start a two day look at the properties of quadrilaterals. Today we cover the quadrilateral, the trapezoid, the parallelogram and the rhombus. Please click on the comic strip to enlarge if necessary.

Here I include 3 neat little puzzles, including another one that can be solved using Boolean Algebra. Again, I have gone to my great Recreational Magazine Magazine from February 1961 for my sources. Please click on the file name to see the pdf file.
Three Miscellaneous Puzzles

Here is a quick little formula (one of these “formulas you carry around in your head for the rest of your life”) to give you a quick estimate of the length of time in years, it will take to double an investment if you know the interest rate per year.  Please click on the file [...]

I learned matrices in the 60’s and the only thing we used them for was systems of equations. Later on I found they could be used for computer graphics, predicting population swings, and understanding networks. Well the following I found to be quite neat as it combines two of my loves, mathematics and sports. Please [...]

This man has had quite an influence on my life, in that I am into geodesic domes (having built two in the 1970’s) and have actually been at one of his live lectures. Read on by clicking the file name below to see the the pdf file.
R. Buckminster Fuller, the Leonardo Da Vinci of the [...]

This video carries on our series of solving quadratic equations. This time we look at solving quadratics by factoring. This is the quickest method, if you are good at factoring, and, or course, if the equation can be factored. If the the equation can NOT be factored, then watch next week!  Watch the video below.