Running Calculators

Simple, easy to use, mobile friendly running calculators ready for desktop, mobile web, or mobile app use! These are a great resource that I threw together as I found myself needing specific running calculators. I noticed that so many of the calculators available out there are complex and hard to use. What if I just […]

Sum to 15 (Magic Squares)

In recreational mathematics, a magic square of order n is an arrangement of n2 numbers, usually distinct integers, in a square, such that the n numbers in all rows, all columns, and both diagonals sum to the same constant. A normal magic square contains the integers from 1 to n2. The term “magic square” is […]