Question : The compound interest earned in two years at 15% per annum is Rs. 20,640. What is the sum invested (in Rs.)?

Option 1: 64000

Option 2: 60000

Option 3: 56000

Option 4: 52000

Question : A man invests a total sum of INR 10,000 in a company. A part of the sum was invested at 10% simple interest per annum and the remaining part, at 15% simple interest per annum. If the total interest accrued in two years equals INR 2,400, the sum invested at 15% simple interest per annum is:

Option 1: INR 8000

Option 2: INR 4000

Option 3: INR 6000

Option 4: INR 5000

Question : The compound interest on a certain sum for 2 years at 10% per annum is Rs. 525. The simple interest on the same sum for double the time at half the rate percent per annum is:

Option 1: Rs. 520

Option 2: Rs. 550

Option 3: Rs. 500

Option 4: Rs. 515

Question : A sum of money invested at compound interest amounts to Rs. 800 in 3 years and to Rs. 840 in 4 years. The rate of interest per annum is:

Option 1: $2\frac{1}{2}$%

Option 2: $4$%

Option 3: $5$%

Option 4: $6\frac{2}{3}$%

Question : Rahul invested equal sums of money at compound interest under two schemes A and B. Under scheme A, the interest rate was 10% per annum, and under scheme B, the interest rate was 12% pa. The compound interest after two years on the sum invested in scheme A was INR 1,050. How much is the interest earned under scheme B after two years, if the interest is compounded annually in both schemes?

Option 1: INR 1,722

Option 2: INR 1,270

Option 3: INR 1,272

Option 4: INR 1,372

Question : If a sum of Rs. 12,500 is invested for 1 year at 12% per annum interest is compounded semi-annually, then the interest earned is:

Option 1: Rs. 1,505

Option 2: Rs. 1,535

Option 3: Rs. 1,545

Option 4: Rs. 1,550