Ashish deposits a certain sum of money every month in a Recurring Deposit Account for a period of 12 months. If the bank pays interest at the rate of 11% p.a. and Ashish gets ₹ 12715 as the maturity value of this account, what sum of money did he pay every month?

Puneet has a recurring deposit account in the Bank of Baroda and deposits ₹ 140 per month for 4 years. If he gets ₹ 8092 on maturity, find the rate of interest given by the bank.

David opened a Recurring Deposit Account in a bank and deposited ₹ 300 per month for two years. If he received ₹ 7725 at the time of maturity, find rate of interest per annum.