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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?"

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