Question : A sum of money at simple interest amounts to INR 800 in 3 years and to INR 900 in 4 years. The sum is:

Option 1: INR 800

Option 2: INR 600

Option 3: INR 500

Option 4: INR 700

Question : A sum of money, invested at a certain rate of simple interest per annum, amounts to INR 720 in 4 years and to INR 800 in 5 years. The sum invested is:

Option 1: INR 400

Option 2: INR 600

Option 3: INR 500

Option 4: INR 360

Question : A sum of money at simple interest amounts to INR 610 in 3 years and to INR 650 in 4 years. The sum is:

Option 1: INR 610

Option 2: INR 570

Option 3: INR 550

Option 4: INR 490

Question : The simple interest on a certain sum of money for 2 years at 7% per annum is double the compound interest on INR 1,000 for 2 years at 10% per annum, compounded annually. What is the sum placed on simple interest?

Option 1: INR 1,000

Option 2: INR 2,000

Option 3: INR 3,000

Option 4: INR 4,000

Question : A sum, when invested for 2 years at the rate of 10% per annum at simple interest, amounts to INR 4,800 on maturity. What is the sum invested?

Option 1: INR 3,600

Option 2: INR 4,000

Option 3: INR 3,500

Option 4: INR 4,200