The nearest integer to $\sqrt{125}$ is

The nearest integer to $\sqrt{125}$ is
  1. $11$
  2. $12$
  3. $10$
  4. $13$

Solution

$11^{2} = 121, 12^{2} = 144$. $\sqrt{125} \approx 11.18$, nearest integer $= 11$.

Asked in: IMO

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