If the true discount on $Rs. 249$ at $5\%$ simple interest $(S.I.)$ is $Rs. 9$,when is the sum due? (in months)

The present worth of $Rs. 920$ due at the end of $3$ years at $5\%$ simple interest per annum is (in $Rs.$)

$A$ banker discounts a $4 \text{ months}$ bill at $3 \%$. If the proceeds are invested in a manner so that nothing is lost,the interest rate should be (in $\%$):

When a discount of $Rs. 42$ is allowed on the marked price of an article,the new reduced price becomes $86 \%$ of the original marked price. Find the marked price (in $Rs.$).

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

If on a marked price,the difference between the selling prices with a single discount of $30 \%$ and two successive discounts of $20 \%$ and $10 \%$ is $Rs.\, 72$,then the marked price (in $rupees$) is: