Are you interested in using different number bases, or you’re studying number bases in school? The articles on this page are a great place to start, particularly for dozenal (also called duodecimal, or base twelve). You can look at A Brief Introduction to Dozenal Counting to get an idea of what exactly dozenal counting is. An even simpler and easier way to grasp the concept is in Eggsactly a Dozen . Once you know what dozenal counting is, you can look at Multiplication in Base Twelve to see the beautiful patterns in the dozenal base, read about the dozenal divisibility tests , then continue on to practice your dozenal arithmetic . Learn how to convert decimals to dozenals and back again by visiting Decimal-Dozenal Conversion Rules . Soon, you'll be using twelve as a number base, multiplying and dividing, adding and subtracting, just as well (better!) than in decimal.