Which of the following is an irrational number

1. $\sqrt{\dfrac{4}{9}}$

2. $\dfrac{\sqrt{12}}{\sqrt{3}}$

3. $\sqrt{7}$

4. $\sqrt{81}$

Which of the following numbers has terminating decimal representation ?

1. $\dfrac{3}{7}$

2. $\dfrac{3}{5}$

3. $\dfrac{1}{3}$

4. $\dfrac{3}{11}$

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