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Divisibility & congruences



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Old Mar15-09, 08:01 PM                  #1
sukichk

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Divisibility & congruences
which elements of Z/60 are invertible?? what are their inverses?

do we have any quick way to do this kind of question??
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Old Mar15-09, 09:09 PM                  #2
CRGreathouse

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Re: Divisibility & congruences
Hint: gcd(n, 60).
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