$1 . \overline{27}$ in the form $\frac{p}{q}$ is equal to

If $(x-a)(x-b)=1$ and $a-b+5=0,$ then the value of $(x-a)^{3}-\frac{1}{(x-a)^{3}}$ is:

If a man spends $\frac{5}{6}$ part of his money and,again earns $\frac{1}{2}$ part of the remaining money,what part of his money is with him now?

The difference between two numbers is $9$ and the difference between their squares is $207$. The numbers are

The value of $\frac{3 \sqrt{2}}{\sqrt{3}+\sqrt{6}}-\frac{4 \sqrt{3}}{\sqrt{6}+\sqrt{2}}+\frac{\sqrt{6}}{\sqrt{3}+\sqrt{2}}$ is

Evaluate $\frac{(2.39)^{2}-(1.61)^{2}}{2.39-1.61}$