Test yourself

TEST YOURSELF

1.  The rate of interest on a sum of money is 4% per annum for the first 2 yrs, 6% per annum for the next 4 yrs and 8% per annum for the period beyond 6 yrs.  If a man gets Rs. 1120 as a simple interest for total period of 9 yrs , how much money did he deposit?

2. The simple interest on a sum of money is 1/16 of the principal and the number of years is equal to the rate percent per annum. Find the rate percent per annum?

3.  A sum of money will double itself in 16 yrs at simple interest at an yearly rate of ________________?

4. Rs. 800 amounts to Rs. 920 in 3 yrs at simple interest.  If the interest reate is increased by 3%, to how much would it amount?

5. A lent Rs. 600 to B for 2 yrs and Rs. 150 to C for 4 yrs and received altogether from both Rs. 90 as simple interest.  The Rate of interest is _______?

 6. A certain sum of money amounts to Rs 756 in 2 yrs and to Rs 873 in 3.5 yrs. Find the sum and rate of interest?

7. If we write the numbers from 1 to 201, what is the sum of all the odd numbers?

8. If we write the numbers from 101 to 309, what is the sum of all the even numbers?

9. The difference between the compound interest and simple interest on a certain sum of money at 5% per annum for 2 yrs is Rs. 1.50. Find the sum ?

10. If the difference between CI and SI on a certain sum of money for 3yrs at 5% p.a. is Rs. 122, find the sum?