Category: Numbers

A cube root can help us to find the side length of a cube with a given volume.  A cube root can also help us to solve cubic equations (where there is an x3 term).  However, it still helps...

Finding percentages helps us to understand how values are increasing or decreasing over time (among other things).  Microsoft Excel can find the percentages for any pair of values (numerator and...

Factorials are useful throughout mathematics: they are found in binomial coefficients, combinatorics, probability distributions, power series expansions (for ex, sin(x), and cos(x)) and the gamma...

What’s the deal with the number e? Do we really need another irrational number that has its own key on most calculators? Isn’t π enough? Usually, the number e gets introduced to us when we...

Adding, multiplying and dividing square roots are important skills for algebra, geometry, and calculus courses.  The rules are a little different for each of these three operations,...

Order of magnitude is an idea that is used often in physics, mathematics, computer science, and other disciplines.  It helps us to get a grasp of how large quantities are – but it still helps...