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SEAMO 2018 — Paper D — Grade 7–8 Question 18

SEAMO · SEAMO 2018 — Paper D — Grade 7–8

Question 18

For positive integer n, $n^2+15n+36$ is a perfect square. Find n.
  1. $13$
  2. $14$
  3. $15$
  4. $16$
  5. None of the above