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What is the sum of all the positive two-digit integers where one of the digits is four times the other plus one?

 Mar 14, 2022
 #1
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15 , 29 , 51 , 92 , Total =187  

 Mar 14, 2022
 #2
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I wonder if    10    would count as one of the possibles ?

 Mar 14, 2022

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