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Convergence articles

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Explain the geometric basis of "completing the square," the original method of solving quadratic equations, to your students.
Tartaglia's method for solving cubics, which he eventually explained to Cardano.
The steamer, Katie, leaves the wharf at New Orleans and runs an average speed of 15 mph. When Katie had gone 25 miles, the steamer R.E. Lee leaves the wharf and runs the average speed of 18 mph. How far will the Lee go before she overtakes the Katie?
In order to encourage his son in the study of arithmetic, a father agrees to pay him 8 pennies for every problem solved correctly and to charge him 5 pennies for each incorrect solution.
A merchant gave a university 2,814 ducats on the understanding that he was to be paid back 618 ducats per year for 9 years, at the end of which the 2,814 ducats should be considered as paid.
A wonderful book about the square root of 2, beginning with the search for the side of a square double a given square.
Four episodes in the history of geometry are discussed, where dynamic geometry helps in understanding the ideas.
An extension of Al-Karaji's formula for the sum of the cubes by a 19th century Turkish author and journal editor
A collection of articles about historical and contemporary women in mathematics.
A horse halving its speed every day runs 700 miles in 7 days.