McDonald

Question:

 How many potatoes (in kg) does McDonald’s sell in a year in the UK?

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Solution: This question is less about how much you know about McDonald’s or potatoes, but rather how you approach the problem.
Start by estimating the number of restaurants in the region. As for potatoes per restaurant, you could estimate the number of orders of fries or hash browns every day, and the number of potatoes that go into each order, and the number of potatoes in a kilo.
According to The Telegraph, McDonald’s used more than 200 million kg of potatoes in 2011 in the UK.

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