If the multiplicative inverse of “53 modulo 21” exists, then which of the following is true?

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answerhappygod
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If the multiplicative inverse of “53 modulo 21” exists, then which of the following is true?

Post by answerhappygod »

a) GCD(53,21) = 1
b) GCD(53,21) = 29
c) GCD(53,21) = 53
d) GCD(53,21) = 12
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