COMSATS UNIVERSITY ISLAMABAD WAH CAMPUS
MS FAIZA KOMEL
PRACTICE QUESTIONS
SIMPLE INTEREST
1. What will be the simple interest for a sum of Rs.8000 invested at 4% per annum rate of
interest for 5years? 1600
2. The simple interest on a certain sum at 7% rate of interest per annum for 10 years is
Rs.2800. Find the sum. 4000
3. A sum amounts to Rs.5200 in 6years at 5% rate of simple interest per annum. Find the
sum. 4000
4. The rate of interest for the first 2years is 3% per annum, for next 3years is 8% per annum
and for the period beyond 5years is 10% per annum. If a man gets Rs.1520 as simple
interest for 6years, how much money did he invested? 3800
5. The simple interest on a certain sum of money is 1/9 of the principal and the number of
years is equal to the rate of interest per annum. Find the rate of interest. 3.33%
6. A sum of money doubles itself in 10years at simple interest. What is the rate of interest?
10%
7. In what time does a sum of money become four times at the simple interest being 5% per
annum? 60years
8. A sum of money doubles itself in 7years. In how many years will it become four-fold?
21years
9. A sum was invested at simple interest at a certain rate of interest for 2years. Had it been
put at 3% higher rate; it would have fetched Rs.300 more. Find the sum. 5000
10. A person lent a certain sum of money at 4% rate of simple interest and in 8years the
interest amounted to Rs.340 less than the sum lent. Find the sum lent. 500
11. Some amount out of Rs. 7000 was lent at 6% per annum and the remaining was lent at
4% per annum. The total SI from both the parts in 5years was Rs.1600. Find the sum lent
at 6% per annum. 2000
12. A sum of money at simple interest amounts to Rs.600 in 4years and Rs.650 in 6years.
Find the sum and rate of interest per annum. 500 ,5%
13. The simple interest on a certain sum of money at 4% rate of interest per annum for 4years
is Rs.80 more than the simple interest on the same sum of money at 5% rate of interest
per annum for 3years. Find the sum. 8000