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Problems from Another Time

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

What is the perpendicular height of a cloud when its angles of elevation were 35 degrees and 64 degrees as taken by two observers at the same time...
Two wine merchants enter Paris, one of them with 64 casks of wine, the other with 20.
When knowing the sum of their ages along with another equation, determine how old a father and son are.
The three sides of a triangular piece of land, taken in order, measure 15, 10, and 13 chains respectively.
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 California miner has a spherical ball of gold, 2 inches in diamter, which he wants to exchange for spherical balls 1 inch in diameter. How many of the smaller spheres should he receive?
After a terrible battle it is found that 70% of the soldiers have lost an eye.
The sum of two numbers is 10 and their product is 40. What are the numbers?
Problems from a 15th century French manuscript, including one with negative solutions
In baking a hemispherical loaf of bread of 10" radius, the crust was everywhere of an equal thickness, and the solidity of the crust was equal to half the solid content of the whole loaf. What were the dimensions of the interior soft part?

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