Which of the following is irrational?

Which of the following is irrational?
  1. $\sqrt{7}$
  2. $\sqrt{4}$
  3. $\dfrac{22}{7}$
  4. $0.5$

Solution

$7$ is not a perfect square, so $\sqrt{7}$ is irrational.

Asked in: MH-SSC-9

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