Simple and Compound Interest - Common Mistakes
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Q. A shopkeeper marks a price of $200 on an item and offers a discount of 15%. What is the selling price?
Q. A sum of $800 is invested at a compound interest rate of 5% per annum. What will be the amount after 2 years?
Q. If a person invests $5000 at a compound interest rate of 8% per annum, what will be the total amount after 3 years?
Q. If a person sells an article for $1200 at a profit of 20%, what was the cost price?
Q. If a sum of money doubles in 5 years at simple interest, what is the rate of interest?
Q. If the simple interest on a sum of money is $300 in 3 years at a rate of 5% per annum, what is the principal?
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