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How many natural numbers greater than 6 but less than 60 are relatively prime to 14?

 Dec 31, 2021
 #1
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The answer is 8.

 Dec 31, 2021
 #2
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Any number above 6 and below 60 that is not divisible by either 2 or 7, which are 2 prime factors of 14.

 

{9 , 11 , 13 , 15 , 17 , 19 , 23 , 25 , 27 , 29 , 31 , 33 , 37 , 39 , 41 , 43 , 45 , 47 , 51 , 53 , 55 , 57 , 59} Total == 23 such coprimes of 14.

 Dec 31, 2021

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