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1986 AMC 8 Question 17

AMC8 · 1986 AMC 8

Question 17

Let $o$ be an odd whole number and let $n$ be any whole number. Which of the following statements about the whole number $o^2 + no$ is always true?
  1. it is always odd
  2. it is always even
  3. it is even only if $n$ is even
  4. it is odd only if $n$ is odd
  5. it is odd only if $n$ is even