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Question

Which of the following is irrational number?
$\sqrt{\frac{8}{18}}$
$\sqrt{\frac{12}{3}}$
$\sqrt{81}$
$\sqrt{\frac{28}{8}}$

A

\sqrt{81}

B

\sqrt{\frac{8}{18}}

C

\sqrt{\frac{12}{3}}

D

\sqrt{\frac{28}{8}}

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Solution

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All numbers that can be written in the form of $\frac{p}{q}$ , where $p$ and $q$ are integers are rational numbers.

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