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Photo of Plimpton 322, an old Babylonian Tablet, from the Plimpton Collection at the Columbia University Library. Part of the Mathematical Treasures section of Loci: Convergence.
A biography of Gauss designed for high school students.

A comparison of the Greek and Chinese approach to the idea of similarity.

A cliff with a tower on its edge is observed from a boat at sea; find the height of the cliff and the tower.
The 2006 Joint Mathematics Meetings in San Antonio, TX, January 12-15, 2006, have many sessions in the history of mathematics and their use in teaching.
This is a regular monthly colloquium meeting at Adelphi University in Garden City, NY
Two circles of radii 25 feet intersect so that the distance between their centers is 30 feet. What is the length of the side of the largest square inscribable within their intersecting arcs?

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

This is the title page of the first textbook in the calculus of variations, Leonhard Euler's Method of Finding Curved Lines that Show some Property of Maximum or Minimum. It was published in 1744.
A mouse is at the top of a poplar tree 60 braccia high, and a cat is on the ground at its foot. The mouse decends 1/2 a braccia a day and at night it turns back 1/6 of a braccia.