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1956 AMC 12 Question 25

AMC12 · 1956 AMC 12

Question 25

The sum of all numbers of the form $2k+1,$ where $k$ takes on integral values from $1$ to $n$ is:
  1. $n^2$
  2. $n(n+1)$
  3. $n(n+2)$
  4. $(n+1)^2$
  5. $(n+1)(n+2)$