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The eleventh International Congress on Mathematical Education will meet in Monterrey, Mexico from July 6 to July 13, 2008.
A tree is 20 feet tall and has a circumference of 3 feet. There is a vine that winds seven equally spaced times around the tree and reaches the top. What is the length of the vine?
This book explores the history of mathematics from the perspective of the creative tension between common sense and the "impossible" as the author follows the discovery or invention of new concepts that have marked mathematical progress.


In a square box that contains 1000 marbles, how many will it take to reach across the bottom of the box in a straight row?
A fellow said that when he counted his nuts by twos, threes, fours, fives and sixes, there was still one left over; but when he counted them by sevens they came out even. How many did he have?

In this collection of essays on modern trends and issues in the history of mathematics, consideration of mathematics history in the classroom is often more theoretical than practical.

A number of 3 digits in base 7 has the same three digits...
Given the fraction ax/ (a-x ), convert it into an infinite series.
Given: a circle with an inscribed equilateral triangle. The triangle has an area of 12 square units. What is the area of the circle?

Curve sketching, tangent lines, and optimization, explored via interactive applets

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