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Problems from Another Time

Individual problems from throughout mathematics history, as well as articles that include problem sets for students.

If in a circle ABDC, circumscribe an equilateral triangle ABC; the straight line AD is equal to the sum of the two straight lines BD and DC: required a demonstration.
The authors recount the 'great tale' of Napier's and Burgi's parallel development of logarithms and urge you to use it in class.
A cat sitting on a wall 4 cubits high saw a rat prowling 8 cubits from the foot of the wall;
Two travelers, starting at the same time from the same point, travel in opposite directions round a circular railway.
What proportions of sugar at 8 cents, 10 cents and 14 cents per pound, will compose a mixture worth 12 cents per pound?
Discussion of 15th century French manuscript, with translation of its problems, including one with negative solutions
Fibonacci gave a practical rule for approximating the area of an equilateral triangle.
A wooden beam is stood vertically against a wall. The length of the beam is 30 units.
The dimensions of a rectangular box in inches are expressed by three consecutive numbers. The surface of the box is 292 square inches. Find the dimensions.
Given two circle tangent at the point P with parallel diameters AB, CD, prove that APD and BPC are straight lines.

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