2001 IMO Problems/Problem 6

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Problem 6

$K > L > M > N$ are positive integers such that $KM + LN = (K + L - M + N)(-K + L + M + N)$. Prove that $KL + MN$ is not prime.

Solution

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See also

2001 IMO (Problems) • Resources
Preceded by
Problem 5
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Problem 6
All IMO Problems and Solutions
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