Sangeetha borrowed Rs. 8,000 from Alex for 2 years at 121/2% per annum. What interest did Sangeetha pay to Alex if the interest is compounded annually?

Find the discount, discount percent, selling price and the marked price.

Find the Amount and Compound Interest in the following cases:

Maria invested Rs. 80,000 in a business. She would be paid interest at 5% per annum compounded annually. Find

(i) the amount standing to her credit at the end of second year and (ii) the interest for the third year.

Find the compound interest on Rs. 24,000 compounded half - yearly for 11/2 years at the rate of 10% per annum.