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Convergence articles

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A certain bishop ordered that 12 loaves be divided among his clergy.
Having been given the perimeter and perpendicular of a right angled triangle, it is required to find the triangle.
A carpenter has undertaken to build a house in 20 days. He takes on another man and says; "If we build the house together, we can accomplish the work in 8 days!" How long would it take this other man to build the house working alone?
History of Maya calendars, including the modified base 20 number system used in them
A set of four congruent circles whose centers form a square is inscribed in a right triangle ABC where C is the right angle and serves as one corner of the square. Find their radius in terms of the sides; a,b,c, of the triangle.
This is from a letter of June, 1695 in which Leibniz is discussing differentiation with Johann Bernoulli. The work in which these letters appear is the Virorum Celeberr. Got. Gul. Leibnitii et Johann Bernoulli Commercium Philosophicum et Mathematica, originally published in 1740.
This is a collection of plates that Leonardo da Vinci created to illustrate De divina proportione of Luca Pacioli.
Three persons bought a sugar loaf in the form of a perfect cone 25"" high and agreed to divide it...what was the slant height of each one's share?
Now there are three sisters who leave home together.
The highest point of the Andes is about 4 miles above sea level.