The purchase price for an apple and an orange is 100 yen. When n oranges and n + 3 apples are bought the price is 520 yen. Find the number n of oranges and the price of one orange.

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There is a circle from within which a square is cut, the remaining portion having an area of 47.6255 square units.

This website is connected to the book, The Joy of Pi. It has numerous interesting facts about pi, with links to additional sites.

Images of the first printed edition of Euclid's Elements

When knowing the sum of their ages along with another equation, determine how old a father and son are.

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?

A collection of articles about historical and contemporary women in mathematics.

A new history of mathematics in ancient Mesopotamia, concentrating on its social aspects.

A father left $20,000 to be divided among his four sons ages 6, 8, 10, and 12 years respectively so that each share placed at 4 1/2 compounded interest should amount to the same value when its possessor becomes the age 21.

A castle has n rooms each of which has 7 samurai in it.