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Gun metal of a certain grade is composed of 16% tin and 84% copper. How much tin must be added to 410 pounds of this gun metal to make a composition of 18% tin?

Review of The Man of Numbers: Fibonacci's Arithmetic Revolution

Author Keith Devlin argues that the impact of the Pisan merchant and his Arabic numbers on medieval Europe was even greater than previously thought.

When Least is Best

A survey of techniques of minimizing and maximizing over the centuries.

Adam Riese's Rechenbuch

This is a page from the Rechenbuch of Adam Riese. It deals with the measurement of barrels. Also a page that has a table showing numbers both in German words, in Roman numerals, and in the Hindu-Arabic numerals.

Consortium's Historical Notes

Collection of historical articles that appeared in Consortium, the newsletter of COMAP.

Hypatia of Alexandria: Mathematician and Martyr

A biography of Hypatia in her times, which carefully distinguishes between the known facts of her life and the many speculations about her.

Neither Rain nor Sleet nor Snow

If two Post-Boys, A and B at 59 miles distance from one another, set out in the morning in order to meet...

History of Mathematics

Boyer's classic text, as revised by Uta Merzbach, is still worth having.

Joy of Pi Website

This website is connected to the book, The Joy of Pi. It has numerous interesting facts about pi, with links to additional sites.

Review of The Lost Millennium: History's Timetables under Siege

Review of a book that suggests that the accepted historical chronology is fundamentally flawed.