If a ball 6 inches in diameter weighs 32 lbs, what will be the weight of a ball 3 inches in diameter?

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

A man bought a number of sheep for $225; 10 of them having died, he sold 4/5 of the remainder for the same cost and received $150 for them. How many did he buy?

Find the two numbers such that multiplying one by the other makes 8 and the sum of their squares is 27

A barrel has various holes in it. The fist hole empties the barrel in three days...

How high above the earth must a person be raised that he [or she] may see 1/3 of its surface?

Determine the different values of x, when a certain function hits a minimum.

Two men start walking at the same time and travel a distance. One is walking faster and completes the journey sooner. How fast did each man travel?

Given a door and a measuring rod of unknown dimensions, the rod is used to measure the door.

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

There is a log of precious wood 18 feet long whose bases are 5 feet and 2.5 feet in circumference. Into what lengths should the log be cut to trisect its volume?