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08-12-2019
Mathematics

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Prove that given any 17 integers, there exist nine of them whose sum is divisible by 9.

(it might help to use the fact that given any five integer you can find three whose sum is divisible by 3)

Respuesta :

08-12-2019

This is a simple consequence of the Zero-sum problem: https://en.wikipedia.org/wiki/Zero-sum_problem

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