Modular arithmetic, even when disguised as a rounding problem, can be just as simple, if not simpler. The technique discussed here works for any constant N , delivers solutions even when x has 32 or ...

Keeping track of the game is an exercise in the useful arithmetic of remainders. So is reading a clock.

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 ...

This reminded me of modular arithmetic and the formula for calculating the day of the week for any date in history. We use modular arithmetic all the time.