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A certain man says that he can weigh any amount from 1 to 40 pounds using only 4 weights. What size must they be?
A creative expression combining text, design and illustrations, originally designed for the International Congress of Mathematicians in Madrid.
This is the page illustrating the construction of an ellipse, from the Latin translation (1538) of the Treatise on Mensuration of Albrecht D�rer (1471-1528). This book was originally written in German and published in 1525 and was designed to teach German artists the geometrical ideas on which perspective in painting was based.
Find a number having remainder 29 when divided by 30 and remainder 3 when divided by 4.
A bridge is built across a river in 6 months by 45 men. It is washed away by the current. Required the number of workmen sufficient to build another of twice as much worth in 4 months.
If you are h feet tall and walk all the way around the Earth, keeping to the same circumference, how much farther has your head gone than your feet when you complete the journey?
A survey of techniques of minimizing and maximizing over the centuries.
Netscape Users
What number which being increased by 1/2, 1/3, and 1/4 of itself, the sum shall be 75?
A history of attempts to develop formulas expressing the sums of powers of the first n positive integers from the Pythagoreans to Jakob Bernoulli. With exercises.