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Subjects
Mathematics State Board
Class 9
Real Numbers
Surds and its Basic Operations and Scientific Notation

2. Multiple choice questions II

Exercise condition:

3 m.

1. If

$\sqrt{80} = k \sqrt{5}$ , then

$k =$

$16$
$2$
$4$
$8$

2.

$4\sqrt{7} \times 2\sqrt{3}$

$=$

$8 \sqrt{21}$
$8 \sqrt{10}$
$6 \sqrt{21}$
$6 \sqrt{10}$

3. When written with a rational denominator, the expression

$\frac{2 \sqrt{3}}{3 \sqrt{2}}$ can be simplified as

$\frac{\sqrt{6}}{3}$
$\frac{\sqrt{2}}{3}$
$\frac{2}{3}$
$\frac{\sqrt{3}}{2}$

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