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Convergence articles

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Where does pi come from? Why should we be interested in negative numbers, or square roots of negative numbers? How did people ever figure out the quadratic formula? A truly wonderful reference for teachers at all levels.
A collection of articles dealing with mathematical models and objects and how they can be used in teaching.
Now there are six-headed four-legged animals and four-headed two-legged birds placed together.
A man has four creditors. To the first he owes 624 ducats; to the second, 546; to the third, 492; and to the fourth 368.
The authors recount the 'great tale' of Napier's and Burgi's parallel development of logarithms and urge you to use it in class.
A history of the development of Pascal's triangle in its various manifestations
A rifle ball is fired through a three-inch plank, the resistance of which causes an unknown constant retardation of its velocity.
In the figure at the left, if the radii of each inscribed circle is 1, what are the dimensions of the bounding rectangle?
The square root of half the number of bees in a swarm has flown out upon a jessamine bush; 8/9 of the swarm has remained behind.
A history of the various algebraic structures that came together to give us "abstract algebra" by early in the twentieth century.

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