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A letter to Sam Greitzer, late editor of Arbelos, discussing the derivation of two formulas for calculating pi.

Our reviewer praises the selection of excerpts, the use of facsimiles rather than transcriptions, and the commentary and English translation in this collection.

A great book from which to learn and teach the subject of relativity.

The Arithmetic of Boethius (480-524) dates from the early sixth century. This page is from a mansucript (Plimpton MS 165) that dates from approximately 1294, written on vellum.

A general formed his men into a square, that is, an equal number in rank and file, and he found that he had an excess of 59 men.

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.

The sum of two numbers is 10 and their product is 40. What are the numbers?

After a terrible battle it is found that 70% of the soldiers have lost an eye.

What is the sum of the reciprocals of the triangular numbers?

Images of the first printed edition of Euclid's Elements

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