Science:Math Exam Resources/Courses/MATH312/December 2005/Question 04
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Question 04 

Multiple Choice The number of primitive roots of 99 is

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Hint 

The number of primitive roots modulo n is equal to provided that for some odd prime p. 
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Solution 

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Please rate my easiness! It's quick and helps everyone guide their studies. The answer is a = 0 The number of primitive roots modulo n is equal to provided that for some odd prime p. As , we see that n does not take this form and so there are no primitive roots. 