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Convergence articles

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Knowing the base, b, and the altitude, a, of a triangle. Find the expression for a side of the inscribed square.
A merchant gave a university 2,814 ducats on the understanding that he was to be paid back 618 ducats per year for 9 years, at the end of which the 2,814 ducats should be considered as paid.
This is the title page of the Margarita philosophica (Pearl of Wisdom) of Gregor Reisch (1467 - 1525). The first edition was published in 1503. This work was used as a university textbook in the early sixteenth century.
Website containing much information on mathematical symbolism and terminology, as well as portraits of mathematicians from postage stamps.
A book connecting mathematics to mysticism, but not recommended.
This meeting, held in conjunction with the NCTM Annual Meeting, will be dedicated to the memory of Karen Dee Michalowicz.
There is a lion in a well whose depth is 50 palms. He climbs and slips back a certain amount each day. In how many days will he get out of the well?

Problems from a 15th century French manuscript, including one with negative solutions

This website is connected to the book, The Joy of Pi. It has numerous interesting facts about pi, with links to additional sites.
One says that 10 garments were purchased by two men at a price of 72 dirhams. The garments varied in value. The price of each garment of one man is 3 dirhams more than the price for each garment of the other. How many garments did each man buy?