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How many positive multiples of 7 that are less than 1000 end with the digit 3?

 Aug 16, 2018
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How many positive multiples of 7 that are less than 1000 end with the digit 3?

 

\(\begin{array}{|r|r|r|} \hline & n & 7n \\ \hline 1. &9& 63\\ 2. &19& 133\\ 3. &29& 203\\ 4.&39& 273\\ 5.&49& 343\\ 6.&59& 413\\ 7.&69& 483\\ 8.&79& 553\\ 9.&89& 623\\ 10.&99& 693\\ 11.&109& 763\\ 12.&119& 833\\ 13.&129& 903\\ 14.&139& 973\\ \hline \end{array}\)

 

14 positive multiples of 7 that are less than 1000 end with the digit 3.

 

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 Aug 16, 2018

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