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Convergence articles

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Given a number, take 1/3 of the number away from itself and add 2. If this result is multiplied by itself, it equals the number plus 24. What is the number?
How Servois' failed attempt to construct a foundation for the calculus nonetheless helped shape modern mathematics
This is the title page to the English version of Isaac Barrow's Geometrical Lectures, which were originally given in his position as Lucasian Professor of Mathematics at Cambridge University. These lectures contain one of the earliest statements and proofs of what is today known as the fundamental theorem of calculus.
A listing of the history sessions at the 2008 Joint Mathematics meetings in San Diego, January 4-9, 2008.
What is the sum of the reciprocals of the triangular numbers?
Boyer's classic text, as revised by Uta Merzbach, is still worth having.
Age
My age is a number consisting of two digits, 1/2 of this number is a mean proportional between these two digits, and two years hence, my age will be a third proportional to the same two digits, directly as they stand in my present age.
A father wills his estate valued at $40, 000 to his three children. Before the settlement one of the children dies. What should the other two receive?
Imagine an urn with two balls, each of which may be either white or black. One of these balls is drawn and is put back before a new one is drawn.

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