Question : If the difference between the compound interest and simple interest on a certain sum at the rate of 5% per annum for 2 years is Rs. 20, then the sum is:

Option 1: Rs. 2000

Option 2: Rs. 4000

Option 3: Rs. 6000

Option 4: Rs. 8000

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 certain sum amounts to INR 3,640 in 2 years and INR 4,060 in 8 years at simple interest. Find the approximate rate percentage per annum.

Option 1: 4%

Option 2: 2%

Option 3: 1%

Option 4: 3%

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 : A sum of money at simple interest amounts to Rs. 6,000 in 4 years and to Rs. 6,750 in 7 years at the same rate percent per annum of interest. The sum (in Rs.) is:

Option 1: 5,100

Option 2: 4,800

Option 3: 4,000

Option 4: 5,000