What is a surd?
A rational number
An irrational number
A prime number
Which is the irrational number?
2.5
2.7888869584...
\[2\:\frac{1}{4}\]
Simplify \(\sqrt{32}\).
\[\sqrt{16 \times 2}\]
\[\sqrt{8}\]
\[4\sqrt{2}\]
Simplify \(\sqrt{98}\).
\[7\sqrt{2}\]
\[\sqrt{49}\sqrt{3}\]
\[7\sqrt{2}\sqrt{7}\]
Simplify \(\sqrt{18} - \sqrt{8}\).
\[\sqrt{3}\]
\[\sqrt{2}\]
\[\sqrt{10}\]
Simplify \(\sqrt{3} \times \sqrt{12}\)
6
\[\sqrt{6}\]
\[\sqrt{36}\]
Simplify \(3\sqrt{7} - \sqrt{28}\).
7
\[\sqrt{7}\]
\[3\sqrt{7}\]
Simplify \(\frac{\sqrt{125}}{(\sqrt{18}\:\times\:\sqrt{50})}\).
\[\frac{5\sqrt{5}}{6}\]
\[\frac{\sqrt{5}}{6}\]
\[\frac{\sqrt{5}}{\sqrt{6}}\]
Rationalise the denominator of \(\frac{2}{\sqrt5}\).
\[\frac{2\sqrt5}{5}\]
\[\frac{2}{\sqrt{25}}\]
\[\frac{2}{5}\]
Rationalise the denominator of \(\frac{4}{7-3\sqrt{2}}\).
\[\frac{4}{4\sqrt{2}}\]
\[\frac{28+12\sqrt{2}}{31}\]
\[\frac{28-12\sqrt{2}}{67-42\sqrt{2}}\]