Free Practice Questions for Square-and-square-root in Maths

$\sqrt{32}-\sqrt{128}+\sqrt{50}$
$=\sqrt{2 \times 2 \times 2 \times 2 \times 2}$
$-\sqrt{\underline{2 \times 2} \times 2 \times 2 \times 2 \times 2 \times 2}+\sqrt{5 \times 5 \times 2}$
$=4 \sqrt{2}-8 \sqrt{2}+5 \sqrt{2}$
$=9 \sqrt{2}-8 \sqrt{2}=\sqrt{2}=1.414$

$\sqrt{x}+238=360 \times \frac{4}{5}$
$\Rightarrow \quad \sqrt{x}+238=288$
$\Rightarrow \quad \sqrt{x}=50$
$\Rightarrow \quad x=2500$