Assertion (A): The rationalising factor of 2 + $\sqrt{3}$ is 2 - $\sqrt{3}$.

Reason (R): Both 2 + $\sqrt{3}$ and 2 - $\sqrt{3}$ are surds.

1. Assertion (A) is true, Reason (R) is false.

2. Assertion (A) is false, Reason (R) is true.

3. Both Assertion (A) and Reason (R) are true, and Reason (R) is the correct reason for Assertion (A).

4. Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct reason (or explanation) for Assertion (A).

Without actual division, find whether the following rational numbers are terminating decimals or recurring decimals :

$\begin{matrix} \text{(i)} & \dfrac{13}{45} \\[1.5em] \text{(ii)} & -\dfrac{5}{56} \\[1.5em] \text{(iii)} & \dfrac{7}{125} \\[1.5em] \text{(iv)} & -\dfrac{23}{80} \\[1.5em] \text{(v)} & -\dfrac{15}{66} \\[1.5em] \end{matrix}$

In case of terminating decimals, write their decimal expansions.

Insert a rational number between $\dfrac{5}{9}$ and $\dfrac{7}{13}$, and arrange in ascending order.

Insert four rational numbers between $\dfrac{4}{5}$ and $\dfrac{5}{6}$.