A boy gives 11 coins of equal denomination to a man, and the man finds that their total value in yen is 4 less than his age.

Displaying 71 - 80 of 665

Arithmos seminars are 24-hour workshops on the classics of mathematics, read in the original, or in a scholarly English translation.

Problems from a 15th century French manuscript, including one with negative solutions

This is page 167 from the Exercitationes mathematicae (1657) of Frans van Schooten (1615-1660). This book contained a collection of mathematical construction problems, among much else. It was one of the books read by Isaac Newton while he was a student at Cambridge University and helped to introduce him to modern mathematics. On this page we see a construction enabling one to find the distance across a river.

Poster picturing five famous women, from Hypatia to Grace Hopper.

The highest point of the Andes is about 4 miles above sea level.

Two bicyclists travel in opposite directions around a quarter-mile track and meet every 22 seconds. When they travel in the same direction on this track, the faster passes the slower once every 3 minutes and 40 seconds. Find the rate of each rider

Why should we use historical problems in today's classroom? This article answers that question and serves as an introduction to the problems on this website.

Suppose a man had put out one cent at compound interest in 1620, what would have been the amount in 1824, allowing it to double once in 12 years?

Now there is a wall 5 feet thick and two rats tunnel from opposite sides.