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Convergence articles

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A description of a Research Experience for Undergraduates conducted in 2007 at Hood College.
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?"
A square walled city measures 10 li on each side. At the center of each side is a gate. Two persons start walking from the center of the city.
Given a right triangle where you know the length of the base and the sum of the perpendicular side and the hypotenuse.

A survey of concepts of infinite sets over the centuries.
Eratosthenes' measurement of the earth, in a form that's easy for teachers to use in the classroom.
A novel about Pythagoras and his followers
Prove geometrically that the hypocycloid is a straight line when the radius of the rolling circle is one-half the radius of the fixed circle.
The author takes us on a historical tour of mathematics through postage stamps of the world that display mathematicians and mathematics.