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A farmer sold a team of horses for $440, but did not receive his pay for them until 1 yr, 8 mo after the sale. He had at the same time another offer of $410 for them. Did he gain or lose by the sale and by how much, money being worth 6%/yr?

Who's That Mathematician? Images from the Paul R. Halmos Photograph Collection

Page 8, Images from the Paul Halmos Photograph Collection: Armand Borel, Karol Borsuk, Raoul Bott, William Browder, H. Arlen Brown, and R. Creighton Buck

History of Mathematical Symbolism and Terminology

Website containing much information on mathematical symbolism and terminology, as well as portraits of mathematicians from postage stamps.

A Treatise of Algebra by John Wallis, Harriot, Descartes

This is the title page of the Treatise of Algebra (1685), by John Wallis. This is probably the first attempt at a history of the subject of algebra, presented in the context of a text on the subject. Among the most famous parts of this treatise is Wallis's discussion of the work of Thomas Harriot, especially his contention that Rene Descartes plagiarized Harriot's symbolization procedure in algebra.

The Pioneers of Calculus

A collection of sixteen posters of contributors to calculus, with brief biographical sketches.

Man Crossing a Bridge

A man is walking across a bridge, when a boat passes under the bridge.How rapidly are the boat and the pedestrian separating after the boat passes under the bridge?

Project Mathematics

Videotape of aspects of the history of mathematics.

Running Horse

A horse halving its speed every day runs 700 miles in 7 days.

The Prince of Mathematics: Carl Friedrich Gauss

A biography of Gauss designed for high school students.

Mathematical Treasure: Robert Tanner's A Mirror for Mathematiques

Images from a 16th-century text about the astrolabe and its uses