The mathematics of cryptology is discussed. Methods for deciphering a code and for ciphering schemes are detailed. (DT)

Comments on bells throughout history are noted. 'Change-ringing,' focusing on the sequence in which bells are rung, is then explored. (MNS)

How to play the medieval game of Rithmomachia, the battle of rhythms, is described. It is really eight games played with one set of rules. (MNS)

An event based on "find the rule" problems has been part of the University of Canberra Maths Day since 1985. In this paper, the authors describe the Swiss event, its context, its aims, its logistics, and gives examples of problems used in past events. The type of problems used, how they are used in an event at the maths day, and how the…

In this address to the Australian Association of Mathematics Teachers the author advocates the use of historical topics in the mathematics classroom. He refers heavily to the 31st yearbook of the National Council of Mathematics; other references are provided. (SD)

Examples of logical paradoxes, including the square root of two paradox, Achilles and the tortoise paradox, author paradox, Russell paradox, bibliomaniac paradox, and Berry paradox, are presented; some are resolved. (DT)

Possible ways of mechanization for counting using a binary system are discussed. Shows a binary representation of the numbers and geometric models having eight triples of lamps. Provides three problem sets. (YP)

In an experimental sequence for students about to complete high school, mathematical fallacies, the Fibonacci series, and deeper treatments of school mathematics were studied. (SD)

The history of the development of trigonometry is outlined from 140 B.C. through the sixteenth century. (MN)

Several sample problems from the "Ladies Diary," published in the early 1700s, are reviewed. They provide a fascinating glimpse of the mathematics considered useful in the eighteenth and early nineteenth centuries. (MP)

Outlines various methods for constructing cardboard polyhedra that can be helpful in the learning of geometric concepts and relationships and can also provide the student with a rewarding, inspiring, and colorful output for display. Includes selected illustrations of suitable construction techniques, as well as finished products. (seven…

A discussion of the mathematics of rugby is related to an earlier article about mathematics and the physical world. (MP)

Proposes the utilization of graph theory to solve optimization problems. Defines the notion of spanning trees and presents two algorithms to determine optimization of a spanning tree. Discusses an example to connect towns by power transmission lines at minimum cost. (MDH)