BEATCALC: Mental Math Exercises. BEATCALC will wake up your brain on Monday morning with a mental math exercise that will stimulate those gray cells. Each Monday you will receive instructions for an exercise that will enable you to do math computations mentally faster than a friend can do them on a calculator. For example, how about learning to square 65 or 95 mentally in quick time? You can...

Get ready for Math Awareness Month! April 2001 will be Math Awareness Month, and the theme will be mathematics and the ocean, recognizing how mathematics enhances our ability to model and to gain insight about complex physical phenomena such as the ocean. Teachers and mathematics enthusiasts looking for ideas on how to celebrate Mathematics Awareness Month (MAM) can visit this Website from The...

These friendly sounding numbers are defined by their divisibility and sums. A perfect number is a number whose positive divisors (except for itself) sum to itself; an amicable number is a pair of numbers each of which equals the sum of the other's aliquot parts; and the members of aliquot cycles of length greater than two are often called sociable numbers. This page, housed at (but not officially...

INTEGERS is a free online journal of combinatorial number theory. Although it is "published with the help of the State University of West Georgia, Charles University, and DIMATIA," the journal's editors are professors and mathematicians from universities around the world. INTEGERS is currently in its third year, and all research papers that have been included in the journal are archived on the Web...

This Web site provides detailed discussions of Diamond Theory, and is intended for college math students or mathematicians. Diamond Theory, according to the author, is best classified in the subject of "finite automorphism groups of algebraic, geometric, or combinatorial structures." The main focus of the material is the technical aspects of the concept, but there are some references to its...

Anyone who wants to put their math skills to the test will find this site holds many formidable challenges. The collection of puzzles tests visitors' knowledge of "geometry, probability, number theory, algebra, calculus, and logic." Each puzzle is accompanied by a page of hints and a fully worked solution. The site's maintainer states that a pre-college math background is usually sufficient, but...

Based at the University of Plymouth, the Centre for Innovation in Mathematics Teaching has developed many instructional materials designed to help both novice and experienced math teachers. This particular area of their website provides access to a number of interactive mathematics tutorials. The materials are divided into eight units, including those that deal with factors, mathematical diagrams,...