Compound interest calculations with technology

12 questions

1. Heidi has calculated that £50 saved for 3 years with 3% compound interest would return £54.63. What mistake has she made?
2. What is the amount of simple 1.9% interest earned on an investment of £900 over 4 years?
3. The cost of a game increases by 3% each month for 3 months. It now costs £36.06. What was the original price?
4. What is the amount of simple 2.7% interest earned on an investment of £25000 over 3 years?
5. What is the amount of compound 3% interest earned on an investment of £1800 over 2 years?
6. What is the amount of simple 3.8% interest earned on an investment of £9000 over 3 years?
7. What is the correct multiplier for compound interest over 5 years at 3.2%?
8. What is the correct multiplier for compound interest over 4 years at 1.5%?
9. What is the correct multiplier for compound interest over 9 years at 0.7%?
10. What is the correct multiplier for compound interest over 5 years at 0.5%?
11. What is the correct multiplier for compound interest over 8 years at 8%?
12. What is the correct multiplier for compound interest over 12 years at 1.2%?

License: OGL