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Problems from Another Time

Individual problems from throughout mathematics history, as well as articles that include problem sets for students.

A copper water tank in the form of a rectangular parallelepiped is to made. If its length is to be a times its breadth, how high should it be that for a given capacity it should cost as little as possible?
Suppose General [George] Washington had 800 men and was supplied with provisions to last 2 months but he needed to feed his army for 5 months.
A number of 3 digits in base 7 has the same three digits...
Prove Chuquet's rule of average numbers.
Suppose a ladder 60 feet long is placed in a street so as to reach a window 37 feet above the ground on one side of the street...
Determine the radii of three equal circles described within and tangent to a given circle, and also tangent to each other.
The sum of two numbers is 10 and their product is 40. What are the numbers?
The authors recount the 'great tale' of Napier's and Burgi's parallel development of logarithms and urge you to use it in class.
A lady being asked how old she was at the time of her marriage replied that the age of her oldest son was 13; that he was born 2 years after her marriage...
A circle ABDC is circumscribed around an equilateral triangle ABC.  Prove that the straight line AD is equal to the sum of the two straight lines BD and DC.

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