Imagine an urn with two balls, each of which may be either white or black. One of these balls is drawn and is put back before a new one is drawn.

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

A certain gentleman ordered that 90 measures of grain were to be transported from his house to another, 30 leucas distant.

A bridge is built across a river in 6 months by 45 men. It is washed away by the current. Required the number of workmen sufficient to build another of twice as much worth in 4 months.

Given the cats eye as shown. Let the radius of the eye be given by R. What is the area of the pupil?

The triangle ABC has a right angle at C. Show that 1/ED=1/AC+1/AB

Three hundred pigs are to be prepared for a feast.

A man went to a draper and bought a length of cloth 35 braccia long to make a suit of clothes.

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

Two circles, the sum of whose radii is a, are placed in the same plane with their centers at a distance 2a...

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