Question : On a certain sum of money, the simple interest for 2 years is INR 150 at the rate of 10% per annum. What is the difference between compound interest and simple interest for 2 years if, in the case of compound interest, interest is compounded annually at the rate of 10% per annum?

Option 1: INR 5

Option 2: INR 10

Option 3: INR 7.5

Option 4: INR 12.5

Question : If at compound interest a certain sum becomes 2 times itself in 5 years, then in how many years will it become 8 times itself?

Option 1: 18 years

Option 2: 12 years

Option 3: 20 years

Option 4: 15 years

Question : The simple interest received on a sum at the rate of 8 percent per annum is $\frac{2}{5}$ of the sum. What is the period?

Option 1: 6 years

Option 2: 5 years

Option 3: 4 years

Option 4: 7.5 years

Question : At what rate of compound interest (compounding annually) per annum will a sum of Rs. 250000 becomes Rs. 275625 in 2 years?

Option 1: 8% per annum

Option 2: 3% per annum

Option 3: 10% per annum

Option 4: 5% per annum

Question : What is that rate of simple interest at which a sum of money becomes three times itself in 36 years?

Option 1: 7.28%

Option 2: 6.86%

Option 3: 5.55%

Option 4: 6.28%