An introduction to prime numbers
By: Rob Speed
To understand what a prime number is, it is first necessary to revisit the idea of a 'factor'. Take the number '6', for example: since 6 can be divided by the numbers 1, 2, 3 and 6, these numbers are said to be factors...
The difference between plane geometry and solid geometry
By: Dr Hussain Rangwala
In the simplest sense, plane geometry is generally associated to two dimensions and solid geometry to three dimensions. In perception all the things we use and/or see in our mundane lives are in one way or another related to solid geometry that is they...
How the abacus can speed solving mathematical problems
By: Michael Peyton
The abacus is a counting tool, used to help speed up mathematical calculations, and has been in use since ancient times. An abacus consists of beads strung on wires that run across a wooden frame. This device may seem archaic in today's world because...
Understanding natural numbers
By: Jeremy Ross - 518986
The Natural numbers, N, are extremely important in the world of mathematics. They are often referred to as counting numbers. An easy way to think about the Natural numbers is as positive whole numbers or Integers. Some mathematicians consider 0 to be an element...
Mathematics: Mode, median and mean averages
By: Peter Flom
The arithmetic mean (aka mean or average), the median, and the mode In this introductory statistics article, we will explore the mean, formally known as the arithmetic mean (average) and how it's used and abused, and compare it to the median and the mode. When...
Do Sudoku puzzles improve mathematical skills?
By: Peter Flom
Sudoku is a great puzzle, but it is not about mathematics at all. To see this, note that you could substitute the letters A through I for the numbers 1 through 9, and you will have the same puzzle. The 'normal' Sudoku, as most readers...
By: Peter Flom
Most generally, a dependent variable (DV) is something which we think depends on one or more independent variables (IV). That is, we think that, if the IVs change, the DV will change. There is a causal element here - but statistics cannot test the causation...
Statistical measures of spread
By: Peter Flom
When we have quantitative data, one thing we often want to know is where the center is, and, for that, we can look at the mean, median, mode, trimmed mean, and other measures. But we also want to know how spread out the numbers are...
By: Peter Flom
Note: This is an introduction, and I deliberately avoid getting into technical details. Entire books have been written about the details, and, if you use statistics, you will likely have your own sources. Statistical significance is used widely - in all the sciences, in...
Mathematics: Bar, line and Pie graphs
By: Peter Flom
These are three of the most common statistical graphics; in fact, they are ubiquitous. Each is used for a different purpose. The most common use of a bar graph is to show the relationship between a categorical variable and a continuous one. For example, to...

 

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