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7x = 6 mod 5. Then the value of x is(a) 2(b) 3(c) 4(d) 5The question was posed to me during an interview.I'm obligated to ask this question of Polynomial and Modular Arithmetic- III in section Basic Concepts in Number Theory and Finite Fields of Cryptograph & Network Security

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The CORRECT answer is (b) 3

To explain I WOULD say: 7 x 3 mod 5 = 6 mod 5 = 1.



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