Which one of the following is a rational number: - Vidyadip

MCQ

Which one of the following is a rational number:

✓
$(\sqrt{2})^{2}$
B
$2\sqrt{2}$
C
$2 + \sqrt{2}$
D
$\frac{\sqrt{2}}{2}$

✓

Answer

Correct option: A.

$(\sqrt{2})^{2}$

Observe that, $ (2^{\frac{1}{2}})^{2}=2$
$\therefore$ it is a rational number , All other numbers are irrational.

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