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Problems from Another Time

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

Four men already having denari found a purse of denari; each man has a different amount of denari before they found the purse. Find out how much denari each man has.
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?
What is the perpendicular height of a cloud when it's angles of elevation were 35 degrees and 64 degrees as taken by two observers?
What number which being increased by 1/2, 1/3, and 1/4 of itself, the sum shall be 75?
How much does Landowner A give to each worker knowing Landowner B gives a certain amount more and has few workers.
A gentleman has bought a rectangular piece of land whose perimeter is to be 100 rods.
A copper water tank in the form of a rectangular parallelopiped 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?
Find the height of a window.
A ladder is placed perpendicular to the plane of the horizon, and in coincidence with the plane of an upright wall.
A man entered an orchard through 7 gates, and there took a certain number of apples. When he left the orchard, he gave the first guard half the apples he had and 1 apple more.

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