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Difference between revisions of "2013 Canadian MO Problems/Problem 2"

(Created page with "==Problem == The sequence <math>a_1, a_2, \dots, a_n</math> consists of the numbers <math>1, 2, \dots, n</math> in some order. For which positive integers <math>n</math> is it...")
 
(No difference)

Latest revision as of 01:18, 27 November 2023

Problem

The sequence $a_1, a_2, \dots, a_n$ consists of the numbers $1, 2, \dots, n$ in some order. For which positive integers $n$ is it possible that the $n+1$ numbers $0, a_1, a_1+a_2, a_1+a_2+a_3,\dots, a_1 + a_2 +\cdots + a_n$ all have di fferent remainders when divided by $n + 1$?

Solution

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