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Convergence articles

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A set of n disjoint, congruent circles packs the surface of a sphere S so that each region of the surface exterior to the circles is bounded by arcs of three of the circles.

The author shows how teachers can use Leonhard Euler's original works in the classroom to explore Euler's famous polyhedral formula,
V + F = E + 2.

When knowing the sum of their ages along with another equation, determine how old a father and son are.
A history of the various algebraic structures that came together to give us "abstract algebra" by early in the twentieth century.
I owe a man the following notes: one of $800 due May 16; one of $660 due on July 1; one of $940 due Sept. 29. He wishes to exchange them for two notes of $1200 each and wants one to fall due June 1. When should the other be due?
There is a log 18 feet long, the diameter of the extremities being 1 ft and 2.6 ft respectively...
Given four numbers whose sum is 9900; the second exceeds the first by 1/7 of the first...
On a certain ground stands two poles 12 feet apart, the lesser pole is 35 ft. in height and the greater 40 ft. It is sought, if the greater pole will lean on the lesser, then in what part will it touch?

The author uses her poem, 'The Enigmatic Number e,' to show how poetry about the history of mathematics can be used to enrich and enliven mathematics instruction.

A translation of one of the earliest European mathematical texts to use the Hindu-Arabic number system.