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A horse, halving its speed each day, travels 700 miles in 7 days. How far does it travel each day?

Images from Frans van Schooten's 1659 edition of The Geometry of Rene Descartes

Gun metal of a certain grade is composed of 16% tin and 84% copper. How much tin must be added to 410 lbs. of this gun metal to make a composition of 18% tin?
Determine the greatest cylinder that can be inscribed in a given cone.
There is a number which when divided by 2, or 3, or 4, or 5, or 6 always has a remainder of 1 and is truly divisible by 7. It is sought what is the number?
Reprint of a classic biography of Gauss, with a new forward by Jeremy Gray.
A discussion of aspects of Leonardo of Pisa's Book of Squares.
Three men wish to buy a horse but none have a sufficient amount of money for the purchase; to do so they must borrow from each other. How much money does each man have and what is the price of the horse?
Divide 100 loaves of bread among 10 men including a boatman, a foreman, and a doorkeeper, who receives double portions. What is the share of each?
The authors provide descriptions of Maya calendar systems, photos of artifacts, examples of calendar conversions, and exercises for classroom use.