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Problems from Another Time

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

IOU
I owe a man the following notes: one of $800 due May 16; one of $660 due on July 1; one of $940 due September 29. He wishes to exchange them for two notes of $1200 each and wants one to fall due June 1. When should the other be due?
Discussion of 15th century French manuscript, with translation of its problems, including one with negative solutions
Two men brought their fish through customs. Find how much the fish cost, and what is the customs fee.
If a ball 6 inches in diameter weighs 32 lbs, what will be the weight of a ball 3 inches in diameter?
Given a semicircle, prove that if O is the circle's center, DO=OE.
A man and his wife drink a barrel of wine at different rates.
On an expedition to seize his enemy's elephants, a king marched 2 yojanas the first day.
There is a round fish pond of certain dimensions, and into the pond is dropped a marble column. How high will the water rise?
Find the greatest value of y in a given equation.
A certain gentleman ordered that 90 measures of grain were to be transported from his house to another, 30 leucas distant.

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