MathDB
2022 A Individual #11

Source:

April 28, 2022
2022 A Individual

Problem Statement

The sum of nn consecutive integers is divisible by nn for some n>1n > 1. For which nn is this always true?
<spanclass=latexbold>(A)</span>even n<spanclass=latexbold>(B)</span>odd n divisible by 3<spanclass=latexbold>(C)</span>odd n<spanclass=latexbold>(D)</span>prime n<spanclass=latexbold>(E)</span>no such n exists<span class='latex-bold'>(A) </span>\text{even }n\qquad<span class='latex-bold'>(B) </span>\text{odd }n\text{ divisible by }3\qquad<span class='latex-bold'>(C) </span>\text{odd }n\qquad<span class='latex-bold'>(D) </span>\text{prime }n\qquad<span class='latex-bold'>(E) </span>\text{no such }n\text{ exists}