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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 number which being increased by 1/2, 1/3, and 1/4 of itself, the sum shall be 75?
It is required to determine whether 30 horses can be put into 7 stalls; so that in every stall there may be, either a single horse, or an odd number of horses.
A gentleman has bought a rectangular piece of land whose perimeter is to be 100 rods.
One says that 10 garments were purchased by two men at a price of 72 dirhams. The garments varied in value. The price of each garment of one man is 3 dirhams more than the price for each garment of the other. How many garments did each man buy?