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What is the average of all positive integers that have four digits when written in base 3 , but two digits when written in base 6 ? Write your answer in base 10 .

 

Answer and explanation please.

 

Thank you

 Oct 25, 2021
 #1
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The numbers that work are 27, 28, 29, 30, and 31, so the answer is 29.

 Oct 25, 2021

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