The work of ten scientists who thought deeply about patterns.

Displaying 61 - 70 of 661

The work of ten scientists who thought deeply about patterns.

A portrait gallery of mathematicians, mostly taken from the collection at the Dibner Library of the Smithsonian, with permission.

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.

On an expedition to seize his enemy's elephants, a king marched 2 yojanas the first day.

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

Page 6: Images from the Paul Halmos Photo Collection of Abram Besicovitch, R. H. Bing, Burton W. Jones, Garrett Birkhoff, Abolghassem Ghaffari, Errett Bishop, and Max Black

A series of circles have their centers on an equilateral hyperbola and pass through its center. Show that their envelope is a lemniscate.

This is the title page of the Margarita philosophica (Pearl of Wisdom) of Gregor Reisch (1467 - 1525). The first edition was published in 1503. This work was used as a university textbook in the early sixteenth century.

Find two numbers, x and y, such that their sum is 10 and x/y + y/x = 25

In how many ways can a vowel and a consonant be chosen out of the word "logarithms?"