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How many primitive roots are there for 19?(a) 4(b) 5(c) 3(d) 6I got this question in an online interview.This interesting question is from Number Theory topic in section More Number Theory of Cryptograph & Network Security

Answer»

The CORRECT option is (d) 6

To explain: 2, 3, 10, 13, 14, 15 are the primitive roots of 19.



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