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Convergence articles

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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.
There are two piles, one containing 9 gold coins, the other 11 silver coins.
What is the perpendicular height of a cloud when its angles of elevation were 35 degrees and 64 degrees as taken by two observers at the same time...
Image of first arithmetic book published in the English colonies in what is now the Eastern United States
An introduction to the priority dispute between Euler and D'Alembert relating to several mathematical ideas that both worked on in the 1740s and 1750s.
A collection of illustrations of Inca quipus, with references to their earliest descriptions.
A number is required; that the square shall be equal to twice the cube.
Poster of Banneker, with a brief description of his life and work.
A five-volume set of biographies of mathematicians from ancient times to the twentieth century, aimed at secondary students.

As is the case with a great deal of interesting mathematics, the conic sections are believed to have been discovered in an attempt to solve a problem, a problem which on the surface seems to have nothing to do with conic sections.

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