# Problems from Another Time

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

Suppose a man had put out one cent at compound interest in 1620, what would have been the amount in 1824, allowing it to double once in 12 years?
How a translation of Peano's counterexample to the 'theorem' that a zero Wronskian implies linear dependence can help your differential equations students
A circle, a square and an equilateral triangle all have the same perimeter equal to 1 meter. Compare their areas.
Rabbits and pheasants are put in a basket.
Knowing the base, b, and the altitude, a, of a triangle. Find the expression for a side of the inscribed square.
Discussion of 15th century French manuscript, with translation of its problems, including one with negative solutions
Now there are 100 deers [being distributed] in a city. If one household has one deer there is a remainder...Find the number of households in the city.
Two men brought their fish through customs. Find how much the fish cost, and what is the customs fee.
A guest on horseback rides 300 li in a day. The guest leaves his clothes behind and the host rides off to catch up with the guest once he discovers the clothes. Assuming the host rides without stop tell how far he can go in a day?
The perimeters of two similar triangles are 45 and 135 respectively. One side of the first triangle has length 11″ and a second side, 19″. Find the lengths of the sides of the second triangle.