A man saves ₹ 3000 every year and invests it at the end of the year at 10% compound interest. Calculate the total amount of his savings at the end of the third year.

A man lends ₹ 12500 at 12% for the first year, at 15% for the second year and at 18% for the third year. If the rates of interest are compounded yearly; find the difference between the C.I. of the first year and the compound interest for the third year.

A man borrows ₹ 5000 at 12 percent compound interest payable every six months. He repays ₹ 1800 at the end of every six months. Calculate the third payment he has to make at the end of 18 months to clear the entire the loan.

On a certain sum of money, the difference between the compound interest for a year, payable half-yearly, and the simple interest for a year is ₹ 180. Find the sum lent out, if the rate of interest in both cases is 10% per annum.