Difference between revisions of "2013 Mock AIME I Problems/Problem 15"

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== Problem ==
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Let <math>S</math> be the set of integers <math>n</math> such that <math>n | (a^{n+1}-a)</math> for all integers <math>a</math>. Compute the remainder when the sum of the elements in <math>S</math> is divided by <math>1000</math>.
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== Solution ==
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<math>\boxed{857}</math>.
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== See Also ==
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*[[2013 Mock AIME I Problems]]
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*[[2013 Mock AIME I Problems/Problem 14|Preceded by Problem 14]]
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*Followed by <math>\textbf{Last Problem}</math>

Latest revision as of 14:14, 1 August 2024

Problem

Let $S$ be the set of integers $n$ such that $n | (a^{n+1}-a)$ for all integers $a$. Compute the remainder when the sum of the elements in $S$ is divided by $1000$.

Solution

$\boxed{857}$.

See Also