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There are a number of wonderful mathematics websites that readers of Convergence should be aware of. We describe some of them here.
Three vertical posts along a straight canal, each rising to the same height above the surface of the water. By looking at the line of vision, determine, to the nearest mile, the radius of the earth.
A popular history of ancient mathematics, dealing with the mathematics of ancient Egypt and Babylonia.
There were two men, of whom the first had 3 small loaves of bread and the other, 2.
A report on an Australian teacher's use of material from the Rhind Papyrus.
What is the value of X...
In this fascinating and accessible book, the author devotes one lively, informative page of description and one striking, full-page illustration to each of 250 milestones in mathematics.
It is required to determine whether 30 horses can be put into 7 stalls; so that in every stall there may be, either a single horse, or an odd number of horses.
A method for extracting square roots used in Italy through the 18th century was introduced in a manuscript by the 12th century mathematician al-Hassar. Appendix: When Was Fermat Born? (Not in 1601 ...)
The cavity of our chimney is an upright parallelepiped, the diagonal of whose base is 60"; and the height of the lower side of the lintel above the plane of the floor is 40".

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