Find two number with sum 20 and when squared their sum is 208.

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

Find two number with sum 20 and when squared their sum is 208.

There is a tree with 100 branches. How many nests, eggs and birds are there?

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

Three hundred pigs are to be prepared for a feast.

A cylindrical tin tomato can is to be made which shall have a given capacity. Find what should be the ratio of the height to the radius of the base that the smallest possible amount of tin shall be required.

A round pond sits in a rectangular garden. Its center is inaccessible; however, you know the distances from each corner of the garden to the center of the pond: 60, 52, 28, and 40 yards. What is the radius of the pond?

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.

A circle is inscribed in an isosceles trapezoid. Find the relationship of the radius to the sides.