Using a simple property of numbers, we look at another “mind reading” mathematical trick. And, of course, I explain why it works (for about 98% of the people). Please click on the file name below to see the pdf file.

Another, “I Can Read Your Mind” Trick

Sometimes it is hard to know how to approach a problem. Do I divide? Do I multiply? This post will help you solve those problems.

Using Canceling Units to Solve Problems – 5.6 L/100 km = how many mi/gal ?

Lagrange, a Great French-Italian Mathematician

When a sequence turns into a series, a couple of new formulas will help you find the sum of the series. Please click on file name below to see the pdf file.
Sums of Arithmetic Series

Icosa and Dodeca carry on with their series on Word Problems, this time discussing how to setup and solve a word problem containing two unknowns. Please click on the comic strip to enlarge if necessary.

When adding and subtracting, it is sometimes useful to work with number pairs. Please click on the comic strip to enlarge if necessary.

Here are a couple of number puzzles, plus the proofs to last week’s puzzles. Please click on the file name to see the pdf file.
Number puzzles 2

Here is a neat little trick that involves the number 1089. Of course, along with how to do the trick, I also show you the proof of why it works.  There once was a saying, “If you know HOW to do something, you will always have a job, but you will be working for the [...]

This post illustrates how to use your combination keys on your calculator to find probabilities in lotteries. Checking with the Lotto-6/49 website brings up a neat little thing.  Please click on the file name below to see the pdf file.
Probabilities of Lotteries

The great French mathematician and physicist, Laplace, kept his head on (and obviously working), while others lost theirs in the French Revolution and the Napoleonic Wars. Read on by clicking on the file name below to see the pdf file.
Laplace, the “French Newton”