The present worth of $Rs. 220.50$ due in $2$ years reckoning compound interest at $5 \%$ per annum is (in $Rs.$):

$A$ bill is discounted at $5 \%$ per annum. If banker's discount be allowed, at what rate of interest must the proceeds be invested, so that nothing is lost? (in $\%$)

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

$A$ shopkeeper allows a $20 \%$ discount on the marked price of his articles. Find the marked price of an article for which he charges $Rs. 740$. (in $Rs.$)

If two successive discounts of $50 \%$ and $10 \%$ are offered,what is the net discount (in $\%$) ?

While selling a shirt,a shopkeeper gives a discount of $7 \%$. If he gives a discount of $9 \%$,he earns $Rs. 15$ less in profit. The marked price of the shirt is (in $Rs.$):