The discount on $Rs. 5229$ due in $1$ $year$ $9$ $months$ reckoning compound interest at $5 \%$ is (in $Rs.$)

$A$ photographer allows a discount of $10 \%$ on the advertised price of a camera. The price (in $Rs.$) that must be marked on the camera,which cost him $Rs.\, 600$,to make a profit of $20 \%$ would be

The true discount on a bill of $Rs. 5450$ due in $9$ months is $Rs. 450$. Find the rate of interest (in $\%$).

At $20 \%$ discount,the selling price of an article is $Rs. 2400$. What is the selling price (in $Rs.$) if the discount is $32.5 \%$?

If $60 \%$ discount is offered on the marked price and selling price becomes equal to cost price,then what was the percentage mark up?

The $B.G.$ on a certain sum due in $5 \text{ years}$ is $\frac{3}{23}$ of $B.D.$ Here,the rate of interest is (in $\%$):