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Dynamic geometry software is used to demonstrate early Greek attempts at the trisection of an angle and the squaring of a circle.
A highly recommended new book on the history and applications of pi.
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?
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?

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

A description of this well-regarded website.
Portraits of 92 living mathematicians, with autobiographical comments.
Having been given the perimeter and perpendicular of a right angled triangle, it is required to find the triangle.
A set of four congruent circles whose centers form a square is inscribed in a right triangle ABC where C is the right angle and serves as one corner of the square. Find their radius in terms of the sides; a,b,c, of the triangle.
There is a tree with 100 branches. How many nests, eggs and birds are there?

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