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Recreations

• 181
• Monthly Problem
• Math problems and solutions from Math Central.

• 182
• Problem of the Fortnight
• Twice-monthly problems with archive and solutions.

• 183
• Problem of the Month
• Posted by the Mathematics Department of Bilkent University.

• 184
• Purdue University Problem of the Week
• Weekly math challenge with past problem archives and solutions.

• 185
• Stony Brook Problem of the Month
• Monthly math challenge with past problem archives and solutions, and hall of fame.

• 186
• The Digit Zero
• Some information about the number zero and links to other pages.

• 187
• Zero
• A history of Zero that describes the introduction of zero and the main persons that brought advantages to it.

• 188
• Exponential Review
• Definition of e and the application of exponentials with nice illustrations.

• 189
• The Base for Natural Logarithms
• computed to over 50.000 digits.

• 190
• The Constant e
• The number e : history, algorithms, computations, references.

• 191
• The Scales Of e
• This article explores the exponential nature of fixed rate and variable rate compound interest through the use of exponentials, natural logarithms and e.

• 192
• e the EXPONENTIAL - the Magic Number of GROWTH
• A text by Keith Tognetti, published as an Australian Mathematical Society Teaching Module. Available in Postscript, PDF or DVI-Format.

• 193
• Infinity
• Article about infinity. Talks about potential infinity and actual infinity.

• 194
• Mathnet : Does "Infinity" Exist?
• Looks at the 3 different contexts and says for each whether infinity exists in each one and why. Links to other essay on the same site on infinity.

• 195
• A brief introduction to Golden Ratio
• An interview with George Cardas, describing his use of the Golden Ratio in high-end audio equipment cables.

• 196
• Ask Dr. Math
• A list of questions gathered pertaining to Fibonacci and Golden Ratio.

• 197
• Constructing the Golden Rectangle
• A description of the golden rectangle with formulas and drawings.

• 198
• Phi: That Golden Number
• How to generate the number, GSP script for dividing segments, rectangle and other shapes, the rabbit problem and references.

• 199
• The Golden Ratio
• Extension of the number.

• 200
• The Golden Ratio
• Project with art references and object construction lessons.