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Problems from Another Time

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

After a terrible battle it is found that 70% of the soldiers have lost an eye.
Problems from a 15th century French manuscript, including one with negative solutions
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?
Now a pile of rice is against a wall, it has a base perimeter of 60 feet and a height of 12 feet.
A horse, halving its speed each day, travels 700 miles in 7 days. How far does it travel each day?
A rifle ball is fired through a three-inch plank, the resistance of which causes an unknown constant retardation of its velocity.
What number which being increased by 1/2, 1/3, and 1/4 of itself, the sum shall be 75?
As for a square piece of land that amounts to 100 square cubits, if it is said to you, "Cause it to make a piece of land that amounts to 100 square cubits that is round," what is the required diameter?
A gentleman has bought a rectangular piece of land whose perimeter is to be 100 rods.
There is a regular pentagon. The length of its side is a. Find the area of the pentagon. Generalize your result for a nonagon.

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