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Convergence articles

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To find three quantities x.y, and z...
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.
Eratosthenes' measurement of the earth, in a form that's easy for teachers to use in the classroom.
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.
Page 4: Images of Jose Barria, Paul Halmos, Robert Bartle, Marshall Stone, Hyman Bass, and Joseph Bastian from the Halmos snapshot collection
There is a circle from within which a square is cut, the remaining portion having an area of 47.6255 square units.
The author takes us on a historical tour of mathematics through postage stamps of the world that display mathematicians and mathematics.
This is the title page of the 1599 edition of the Rechenbuch of Simon Jacob (d. 1564), a Rechenmeister of the sixteenth century. This was a commercial arithmetic text, in which the basic laws of arithmetic were applied to many practical problems.
Two men have a certain amount of money. The first says to the second, "If you give me 5 denari, I will have 7 times what you have left."
Suppose the area of an equilateral triangle be 600. The sides are required.