One military horse cannot pull a load of 40 dan; neither can 2 ordinary horses, nor can three inferior horses.

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

There are four companies, in one of which there are 6 men, in another 8, and in each of the remaining two, 9 men. How many ways can a committee of 4 men be composed by choosing one man from each company?

Given a rectangle, find the line through one vertex of minimum length that passes through the extensions of the two opposite sides.

Three men have a pile of money, their shares being 1/2, 1/3 and 1/6. Each man takes some money from the pile until nothing is left.

A person has a circular yard that is 150 ft. in diameter, and wishes a walk of equal width made round it within the fence...

There is a right triangle where: the sum of the upright multiplied by itself twice and the hypotenuse multiplied by itself is 700 units; and, the sum of the base multiplied by itself twice and the hypotenuse multiplied by itself is 900 units.

Three men wish to buy a horse but none have a sufficient amount of money for the purchase; to do so they must borrow from each other. How much money does each man have and what is the price of the horse?

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

In Archimedes' Book of Lemmas (ca 250), he introduces a figure that, due to its shape, has historically been known as "the shoemaker's knife" or arbelos.

After a terrible battle it is found that 70% of the soldiers have lost an eye.