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Convergence articles

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Information on the NCTM Fall, 2004 Eastern Regional meeting.
What number which being increased by 1/2, 1/3, and 1/4 of itself, the sum shall be 75?
This textbook seamlessly combines the history of non-Euclidean geometry with the mathematical ideas.
Given a pyramid 300 cubits high, with a square base 500 cubits to a side, determine the distance from the center of any side to the apex.
A biography of the 18th century author of an early calculus text, with some translations from the text.
A collection of the Kenneth May lectures in the history of mathematics given at meetings of the Canadian Society for the History and Philosophy of Mathematics.
Having been given the perimeter and perpendicular of a right angled triangle, it is required to find the triangle.
A set of four congruent circles whose centers form a square is inscribed in a right triangle ABC where C is the right angle and serves as one corner of the square. Find their radius in terms of the sides; a,b,c, of the triangle.
If 40 oranges are worth 60 apples, and 75 apples are worth 7 dozen peaches, and 100 peaches are worth 1 box of grapes and three boxes of grapes are worth 40 pounds of pecans, how many peaches can be bought for 100 oranges?
A book connecting mathematics to mysticism, but not recommended.