## Postulates for the natural numbers

Every natural number a has a successor a + 1. (For example, the successor of 5 if 6, the successor of 10 is 11, and so on.) Every natural number a (except 1) has a predecessor a – 1. (The predecessor of 4 is 3, the predecessor of 9 is 8, and so on.) The […]

## Cartoons on Algebra

Find some cartoons below on algebra. Just a darn minute – yesterday you said that X equals two! Algebra is weightlifting for the brain!

## Practical Algebra: A Self-Teaching Guide by Peter H. Selby

If you studied algebra years ago and now need a refresher course in order to use algebraic principles on the job, or if you’re a student who needs an introduction to the subject, here’s the perfect book for you. Practical Algebra is an easy and fun-to-use workout program that quickly puts you in command of […]

## Definition of Algebra

Whatever is capable of increase or diminution, is called magnitude, or quantity. A sum of money therefore is a quantity, since we may increase it or diminish it. It is the same with a weight, and other things of this nature. From this definition, it is evident, that the different kinds of magnitude must be […]