Jack Graver, Counting on Frameworks

Jenny Baglivo & Jack Graver, Incidence and symmetry in design and architecture

Triangular Numbers, Gaussian Integers, and KenKen

John Watkins

The College Mathematics Journal

Vol. 43, No. 1 (January 2012), pp. 37-42

Also, the accuracy of some of the last approximation techniques are incredibly impressive.

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