Art Jorgensen
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An Enigmatic E-Mail Riddle with an Explanation Using Modular Arithmetic
Murray Lauber
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The Birthday Problem Extended
Sandra M. Pulver
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Using a Graphing Calculator to Compute Interest Rates
David R. Duncan and Bonnie H. Litwiller
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On Centroids, Medians and Lines of Symmetry
David E. Dobbs
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Pebble Power: Investigating Stone Shapes
Richard T. Edgerton
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A Fence for the Community Pasture
Klaus Puhlmann
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Four-Color Map Problem
Klaus Puhlmann