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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.
An English translation of Eratosthenes' Geography, which includes "On the Measurement of the Earth."
The history of apportionment of representatives in the U.S. Congress, from the 1790s until today, along with a discussion of the mathematics involved in the various methods.

Curve sketching, tangent lines, and optimization, explored via interactive applets

A description of this well-regarded website.
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?

Having been given the lengths, a and b, of two straight lines drawn from the acute angles of a right triangle to the middle of the opposite sides, determine the lengths of those sides.

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?
Explain the geometric basis of "completing the square," the original method of solving quadratic equations, to your students.
Page 6: Images from the Paul Halmos Photo Collection of Abram Besicovitch, R. H. Bing, Burton W. Jones, Garrett Birkhoff, Abolghassem Ghaffari, Errett Bishop, and Max Black

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