# Convergence articles

Displaying 201 - 210 of 739

A collection of illustrations of Inca quipus, with references to their earliest descriptions.

Given two circles tangent at the point P with parallel diameters AB and CD, prove that APD and BPC are straight lines.

A copper water tank in the form of a rectangular parallelepiped is to made. If its length is to be a times its breadth, how high should it be that for a given capacity it should cost as little as possible?

Make a crown of gold, copper, tin, and iron weighing 60 minae: gold and copper shall be 2/3 of it; gold and tin, 3/4 of it; and gold and iron, 3/5 of it. Find the required weights of gold, copper, tin, and iron.

A biography of Arthur Cayley, the outstanding mathematician of Victorian Britain.

The third part of a necklace of pearls, broken in a lover's quarrel, fell to the ground...

A speculator bought stock at 25% below par and sold it at 20% above par. He gained \$1560. How much did he invest?

A study of the solution of quartic equations in Cardano's Ars Magna and in the work of Euler and Descartes.

Two circles, the sum of whose radii is a, are placed in the same plane with their centers at a distance 2a...

This meeting will take place at the MAA Carriage House in Washington, DC on April 19, 2008.