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Convergence articles

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It is required to determine whether 30 horses can be put into 7 stalls; so that in every stall there may be, either a single horse, or an odd number of horses.
The three sides of a triangular piece of land, taken in order, measure 15, 10, and 13 chains respectively.
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?
A method for extracting square roots used in Italy through the 18th century was introduced in a manuscript by the 12th century mathematician al-Hassar. Appendix: When Was Fermat Born? (Not in 1601 ...)
A certain gentleman ordered that 90 measures of grain were to be transported from his house to another, 30 leucas distant.
This book is a collection of mathematical ideas organized around the themes of infinity and the illumination of the nature of mathematical thought.
Having been given the lengths, a and b, of two straight lines drawn from the acute angles of a right triangle to the middle of the opposite sides, determine the length of those sides.
In the figure at the left, if the radii of each inscribed circle is 1, what are the dimensions of the bounding rectangle?
There are two columns in the ruins of Persepolis left standing upright; one is 70 ft. above the plane, and the other 50 ft;
This is an invited working conference as part of the ICMI Study Series.

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