Which of the following numbers has non-terminating repeating decimal expansion ?

1. $\dfrac{11}{80}$

2. $\dfrac{17}{160}$

3. $\dfrac{63}{240}$

4. $\dfrac{93}{420}$

A rational number between $\sqrt{2}$ and $\sqrt{3}$ is

1. $\dfrac{\sqrt{2} + \sqrt{3}}{2}$

2. $\dfrac{\sqrt{2} × \sqrt{3}}{2}$

3. 1.5

4. 1.8

The decimal expansion of the rational number $\dfrac{33}{2^2 × 5}$ will terminate after

1. one decimal place
2. two decimal places
3. three decimal places
4. four decimal places

$\sqrt{10} × \sqrt{15}$ is equal to

1. $6\sqrt{5}$
2. $5\sqrt{6}$
3. $\sqrt{25}$
4. $10\sqrt{5}$