Given a pendulum as shown. The height of the pendulum is two units and its horizontal width is 2 units. What is the area of the pendulum?

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

I wish to find three numbers of such nature that the first and the second with 1/2 of the third makes 20...

A California miner has a spherical ball of gold, 2 inches in diamter, which he wants to exchange for spherical balls 1 inch in diameter. How many of the smaller spheres should he receive?

The sum of two numbers is 10 and their product is 40. What are the numbers?

The authors recount the 'great tale' of Napier's and Burgi's parallel development of logarithms and urge you to use it in class.

A fox, a raccoon, and a hound pass through customs and together pay 111 coins.

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.

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?

Discussion of 15th century French manuscript, with translation of its problems, including one with negative solutions

Curve sketching, tangent lines, and optimization, explored via interactive applets