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Problems from Another Time

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

Assume that the human population after the flood was 6 and that 200 years later the population was 1,000,000. Find the annual growth of the population.
What is the value of X...
In a right triangle, let the perpendicular be 5 and the sum of the base and hypotenuse 25. Find the lengths of the base and hypotenuse
Show that the curves x2 - y2 = a2 and 2 xy = b2 cross at right angles.
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.
Two men have a certain amount of money. The first says to the second, "If you give me 5 denari, I will have 7 times what you have left."
A gentleman has bought a rectangular piece of land whose perimeter is to be 100 rods; and he is to pay 1 dollar for each rod in the length of the land and 3 dollars for each rod in the breath of the land.
If I were to give 7 pennies to each beggar at my door, I would have 24 pennies left in my purse. How many beggars are there and how much money do I have?
How long does it take a single man to do work when...
A horse halving its speed every day runs 700 miles in 7 days.