# Convergence articles

Displaying 71 - 80 of 659

Page from al-Khwarizmi's algebra text written in about 825. The proof of the rule for solving a quadratic equation of the form "squares plus roots equal numbers".
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.
A creative expression combining text, design and illustrations, originally designed for the International Congress of Mathematicians in Madrid.
If you are h feet tall and walk all the way around the Earth, keeping to the same circumference, how much farther has your head gone than your feet when you complete the journey?
Find a number having remainder 29 when divided by 30 and remainder 3 when divided by 4.
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Cantor's work on Fourier series provides historical motivation for the study of point-set topology.
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."
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.
What proportions of sugar at 8 cents, 10 cents and 14 cents per pound, will compose a mixture worth 12 cents per pound?