For the following questions answer them individually
The difference between the length and breadth of a rectangle is 23 m. If its perimeter is 206 m, then find its area.
If $$\sqrt{15} = 3.87$$, then find the value of $$\frac{\sqrt{5} + \sqrt{3}}{\sqrt{5} - \sqrt{3}}$$.
In a certain code, 'HUMIDITY' is written as 'UHMIIDTY'. How is 'POLITICS' written in that code?
Suresh invested a sum of money at Compound interest. It amounted to Rs. 2420 in 2 years and Rs. 2662 in 3 years. Find the rate per cent per annum.