You may never have heard of modular arithmetic, but you use it every day without the slightest difficulty. In this system, numbers wrap around when they reach a certain size called the modulus; it ...

The division also manages membership services for more than 20 scholarly and professional associations and societies. Books With critically acclaimed titles in history, science, higher education, ...

One of my fellow contributors here recently wrote a post about leap years and why we have them. This reminded me of modular arithmetic and the formula for calculating the day of the week for any ...

Automatic Arithmetic: a New System for Multiplication and Division without Mental Labour and without the Use of Logarithms. By John Sawyer, Public Accountant. (London: George Bell and Sons, 1878.) ...