The Stern Brocot Tree

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Grade Vs Difficulty:
  EasyModerateChallengingPerplexing
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5-6
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This lesson examines a remarkable enumeration of the rational numbers that is related to Euclid's algorithm and continued fractions.

It is a sample from

James Tanton, Mathematical Outpourings: Newsletters and Musings from the
St. Mark’s Institute of Mathematics