Oprah has 3500 cars in her collection. If the average number of cars she gives away per year is 50, how many years will it take to reduce her car collection to 500? Let's think first. Chain of thought:
If Oprah wants to have 500 cars left, she will have to give away 3500 - 500 = 3000 cars. Since the average number of cars she gives away per year is 50, it will take her 3000 / 50 = 60 years to give away enough cars to have 500 left over.
Therefore, the answer is 60.