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How many natural numbers greater than 6 but less than 60 are relatively prime to 15?

 Feb 12, 2018
 #1
avatar+101228 
+2

Any that are not divisible by 3 or 5

 

7, 8, 11, 13, 14, 16, 17, 19, 22, 23, 26, 28, 29, 31, 32, 34, 37, 38, 41, 43, 44, 46, 47, 49, 52, 53, 56, 58, 59

 

 

 

If I didn't miss any....I get 29

 

 

cool cool cool

 Feb 12, 2018
 #2
avatar+4259 
+1

That is correct, CPhill!

 Feb 12, 2018

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