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X, Y and Z hired a pasture for the season for $90.00. Each has a different number of mules and are on the pasture for a different number of days. How much is each to pay?

Convergence Advisory Board 2004-2009

This is the title page of the 1640 printing of Galileo's Operation of the Geometrical and Military Compass, originally published privately in 1606. Galileo had invented a version of this geometrical compass a few years earlier and evidently gave copies of this manual to those who bought the compass. The compass had many uses, from performing square root calculations to determining ranges of cannons to solving surveying problems.
There are two numbers which are to each other as 5 and 6 and the sum of their squares is 2196. What are the numbers?
This website is connected to the book, The Joy of Pi. It has numerous interesting facts about pi, with links to additional sites.
Short sketches on how mathematicians work and think.
A CD with eleven modules, each containing numerous activities designed to help secondary teachers use the history of mathematics to teach mathematics.
Collection of historical articles that appeared in Consortium, the newsletter of COMAP.

A detailed study of the cycles of the Mayan calendar, along with some other ancient calendars.

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