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Three images from Kepler's 1609 Astronomia Nova, the text in which he introduced his first two laws of planetary motion

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?
Determine the greatest cylinder that can be inscribed in a given cone.

Convergence Advisory Board 2004-2009

A creative expression combining text, design and illustrations, originally designed for the International Congress of Mathematicians in Madrid.
Find a number having remainder 29 when divided by 30 and remainder 3 when divided by 4.
Suppose a lighthouse is built on the top of a rock; the distance between a place of observation and that part of the rock level with the eye is 620 yds.
The author compares Greek ladder, continued fraction, and Newton's Method approximations, noting that the Greek ladder easily gives both of Archimedes' famous bounds.
A study of the rise of English algebra from the Medieval period to the end of the seventeenth century.
A discussion of a collaborative effort in Italy to produce materials enabling secondary school teachers to use the history of mathematics in the classroom.