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Kosovo MO 2009 Grade 11, Problem 4
Kosovo MO 2009 Grade 11, Problem 4
Source: Kosovo MO 2009 Grade 11, Problem 4
June 7, 2021
number theory
Problem Statement
Prove that
n
11
ā
n
n^{11}-n
n
11
ā
n
is divisible by
11
11
11
.
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