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Convergence articles

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A boy gives 11 coins of equal denomination to a man, and the man finds that their total value in yen is 4 less than his age.
An introduction to the work of Venn as well as the work of the author in extending some of Venn's results.
An erect pole of 10 cubits has its base moved 6 cubits. Determine the new height and the distance the top of the pole is lowered.
Aspects of classical Greek mathematics are compared with areas of Babylonian mathematics.
Two men have a certain amount of money. The first says to the second, "If you give me 5 denari, I will have 7 times what you have left."
The story of Nicolaus Mercator, music, and logarithms.
Subtitled How an Ancient Brotherhood Cracked the Code of the Universe and Lit the Path from Antiquity to Outer Space, this is a book of entertaining stories more so than scholarly research.
What proportions of sugar at 8 cents, 10 cents and 14 cents per pound, will compose a mixture worth 12 cents per pound?
Determine the different values of x, when a certain function hits a minimum.
Given a semicircle, Prove that if O is the circle's center, DO=OE.