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Row Sum


In the following arrangement of numbers, investigate the sum of all the numbers in a row. State your rule. Then use the rule to find the sum of the numbers in the 30th row.

         1        
       3    5      
     7    9    11    
   13    15    17    19  
 21    23    25    27    29


(Source: Mathematics Teaching in the Middle School, Nov-Dec 1997)

 

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