BrainOverfl0w
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 Feb 23 awarded Popular Question Jul 2 awarded Curious Jun 19 comment Number of solutions for $\sum_{i=1}^{4} x_i < 22$ with condition. Thanks, just got confirmation that there is a mistake on the solution sheet. Jun 19 comment Number of solutions for $\sum_{i=1}^{4} x_i < 22$ with condition. Ok. I guess the wrong answer is on the teacher's solution sheet. Thanks :) Jun 19 accepted Number of solutions for $\sum_{i=1}^{4} x_i < 22$ with condition. Jun 19 asked Number of solutions for $\sum_{i=1}^{4} x_i < 22$ with condition. Nov 29 accepted Why is $x^7 = x$ true for every $x$ in $x ∈ Z/14Z$? Nov 29 comment Modular Arithmetic Equations Got it ! Thanks :) Nov 29 accepted Modular Arithmetic Equations Nov 29 comment Why is $x^7 = x$ true for every $x$ in $x ∈ Z/14Z$? Why does it work for 2 and 7 too ? Nov 29 comment Why is $x^7 = x$ true for every $x$ in $x ∈ Z/14Z$? I know. But still don't see how this applies. Nov 29 comment Why is $x^7 = x$ true for every $x$ in $x ∈ Z/14Z$? I'm not sure where this is heading. Nov 29 comment Modular Arithmetic Equations CRT is probably the way to go but not sure how to apply it here. Nov 29 asked Why is $x^7 = x$ true for every $x$ in $x ∈ Z/14Z$? Nov 29 asked Modular Arithmetic Equations Nov 15 comment How many numbers exists that are smaller than $p$ and prime with $p$? Thanks, in short $3947$ is the answer I was looking for. Euler's totient function clarified my confusion. Nov 15 accepted How many numbers exists that are smaller than $p$ and prime with $p$? Nov 15 comment How many numbers exists that are smaller than $p$ and prime with $p$? @JonasKibelbek : I edited the question to be clearer. You're right that it's a different question. Nov 15 revised How many numbers exists that are smaller than $p$ and prime with $p$? edited title Nov 15 asked How many numbers exists that are smaller than $p$ and prime with $p$?