Children enjoy playing a game based on addition module seven. The system can be applied to questions concerning the days of a week. (SD)

Modular arithmetic is used to find the frequency of Friday 13th's in any year. (MM)

Describes a pattern which emerged from an examination of the digits of the squares of numbers. Provides eight examples having the pattern at the units or tens digit of the number. (YP)

In response to an earlier article advocating the elimination of fractions from the curriculum, the author argues for their retention. He points out examples of their use in music and physic, and discusses methods of presenting operations on fractions. (SD)

A method of identification of pigs used by farmers is described as an application of a base three numeration system. (MP)

Uses ancient Egyptian numeration system in a new setting to extend the concepts of base, place value, and correspondence. Discusses similarities and differences between the Egyptian and decimal systems. Students are asked to propose changes to make the Egyptian system easier. (LDR)

Using the methods described, pattern representation of operations in modular systems can be developed. (SD)

This article discusses the classroom use of discovery of number pattern. Provided are examples of a table of squares, multiplications of numbers, and algebraic expressions. (YP)