Simple interest: find the total amount

Use interest = principal × rate × time, with the rate as a percent per year.

1. £900 is invested at 10% simple interest per year for 3 years. How much money is there at the end?
2. £800 is invested at 10% simple interest per year for 1 year. How much money is there at the end?
3. £200 is invested at 10% simple interest per year for 3 years. How much money is there at the end?
4. £700 is invested at 5% simple interest per year for 2 years. How much money is there at the end?
5. £400 is invested at 4% simple interest per year for 1 year. How much money is there at the end?
6. £1100 is invested at 4% simple interest per year for 1 year. How much money is there at the end?
7. £1100 is invested at 4% simple interest per year for 4 years. How much money is there at the end?
8. £2000 is invested at 5% simple interest per year for 4 years. How much money is there at the end?
9. £2900 is invested at 2% simple interest per year for 1 year. How much money is there at the end?
10. £800 is invested at 5% simple interest per year for 2 years. How much money is there at the end?
11. £1100 is invested at 2% simple interest per year for 1 year. How much money is there at the end?
12. £1300 is invested at 2% simple interest per year for 4 years. How much money is there at the end?
13. £4300 is invested at 3% simple interest per year for 4 years. How much money is there at the end?
14. £2500 is invested at 5% simple interest per year for 2 years. How much money is there at the end?
15. £3100 is invested at 1% simple interest per year for 1 year. How much money is there at the end?
16. £1800 is invested at 6% simple interest per year for 6 years. How much money is there at the end?
17. £2200 is invested at 12% simple interest per year for 4 years. How much money is there at the end?
18. £8000 is invested at 9% simple interest per year for 5 years. How much money is there at the end?
19. £3900 is invested at 5% simple interest per year for 2 years. How much money is there at the end?
20. £4600 is invested at 6% simple interest per year for 5 years. How much money is there at the end?