FUVEST (University of São Paulo Entrance Exam) · Mathematics and Physics

Mathematics: Percentages and Interest

10 practice questions, each with the answer and an explanation.

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Random questions from this topic, one at a time. You see the answer and the explanation straight after each one.

All 10 questions

  1. A jacket costs $200 and is sold with a 5% discount. What is the price paid?
  2. $1000 is invested at compound interest of 10% per year. What is the amount after 2 years?
  3. $500 is invested at compound interest of 5% per year. What is the amount after 2 years?
  4. After a 50% increase, a product costs $450. What was its price before the increase?
  5. A price of $800 rises by 10% and then falls by 10%. What is the final price?
  6. What is 15% of 240?
  7. A loan of 2,000 reais is taken at simple interest of 3% per month for 5 months. What is the total amount owed at the end?
  8. A salary rises from 2,500 reais to 3,000 reais. What is the percentage increase?
  9. A shop gives a discount of 20% on a price and then a further 30% discount on the reduced price. What single discount is equivalent to the two?
  10. A city's population grows by 20% every year, compounded. After how many whole years does it first become more than double its initial value?

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