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Convergence articles

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Thirty flasks-10 full, 10 half-empty, and 10 completely empty- are to be divided among 3 sons so that flasks and contents should be shared equally. How may this be done?
A new edition of a classic work on number theory.
Cantor's work on Fourier series provides historical motivation for the study of point-set topology.
Information on previous ESUs
This is a page from a manuscript of the Algebra (Maqalah fi al-jabra wa-al muqabalah) of Omar Khayyam (1048-1131). This work is known for its solution of the various cases of the cubic equation by finding the intersections of appropriately chosen conic sections.
The sum of the two digits of a 2-digit number is 9. If 45 is subtracted from the number, the result will be expressed by the digits in reverse order. Find the number.
Seven men held equal shares in a grinding stone 5 feet in diameter. What part of the diameter should each grind away?
There are two piles, one containing 9 gold coins, the other 11 silver coins.
Given a rectangle, find the line through one vertex of minimum length that passes through the extensions of the two opposite sides.
A gentleman has bought a rectangular piece of land whose perimeter is to be 100 rods.