Gerald, James A.  <br/><br/>
Happy Numbers: A Platform for Conjecture and Exploration (Journal Article) 

 - Reston, Virginia  :National Council of Teachers of Mathematics  ,2023 
 - 617–620p,  
 - Mathematics Teacher: Learning Teaching PK12  , Volume 116: Issue 8_ August 2023 .
<br/><br/> ***______________*** 
<br/><br/><label>ISSN: </label>0025-5769 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Algebra| Sequences| Series| Patterns| Number & Operations|
<br/><br/><label>Dewey Class. No.: </label>510.71