Three congruent circles of radius 6 inches are mutually tangent to one another. Compute the area enclosed between them.

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A certain slave fled from Milan to Naples going 1/10 of the whole journey each day. At the beginning of the third day, his master sent a slave after him and this slave went 1/7 of the whole journey each day.

Instructions that apply to Convergence but not necessarily to other areas of Loci

A study of the nature of architecture in ancient Egypt and its relationship to Egyptian mathematics.

Two cog-wheels, one having 26 cogs, and the other 20 cogs, run together. In how many revolutions of the larger wheel will the smaller gain in 12 revolutions?

Mathematics is often referred to today as the "science of patterns." But has this always been true historically, or is this something that happened in recent times? The question is discussed here with reference to the work of Euclid and Jacob Steiner.

After a terrible battle it is found that 70% of the soldiers have lost an eye.

A horse, halving its speed each day, travels 700 miles in 7 days. How far does it travel each day?

A new edition of a classic work on number theory.

In this fascinating and accessible book, the author devotes one lively, informative page of description and one striking, full-page illustration to each of 250 milestones in mathematics.