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Visit this site: http://www.numberspiral.com/

Author:Robert Sacks
Description: Instructions, observations, formulas, and a glossary about number spirals, formed by writing the non-negative integers on a ribbon, rolling it up with zero at the center, and arranging the spiral so all the perfect squares line up in a row on the right side. In the resulting pattern, primes tend to "line up in curves." Explore product curves, offset curves, factors on product curves, quadratic functions, composite offset curves, and factor curves. Download and run Sacks' free Vortex software for Windows operating systems to draw these graphs with its graphical or command-line interfaces.

Levels: High School (9-12), College
Languages: English
Resource Types: Graphics, Recreations, Topic Tools Miscellaneous
Math Topics: Prime Numbers, Patterns/Relationships

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