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Convergence articles

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Two circles of radii 25 feet intersect so that the distance between their centers is 30 feet. What is the length of the side of the largest square inscribable within their intersecting arcs?
There is a four-sided field whose eastern side measures 35 paces, its western side 45 paces, its southern side 25 paces and its northern side 15 paces. Find the area of this field.
A ladder is placed perpendicular to the plane of the horizon, and in coincidence with the plane of an upright wall.
A general mathematics website with much information on the history of mathematics.
A teacher agreed to teach 9 months for $562.50 and his board. At the end of the term, on account of two months absence caused by sickness, he received only $409.50. What was his board worth per month?

How a translation of Peano's counterexample to the 'theorem' that a zero Wronskian implies linear dependence can help your differential equations students

There is a round fish pond of certain dimensions, and into the pond is dropped a marble column. How high will the water rise?
Title page from the Ars Magna, by Gerolamo Cardano, published in 1545. Engraved portrait of the author. First printed text of algebraic solution of cubic equations.
A certain man says that he can weigh any amount from 1 to 40 pounds using only 4 weights. What size must they be?
A new collection of original source materials in the mathematics of five civilizations.

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