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How much do you know about gas prices? Take our quiz!

Matt Rourke/AP/File
A man returns the nozzle to the pump after filling his car's tank with gasoline in Philadelphia in this February 2011 file photo.

Most drivers know how much they paid for a gallon of gas the last time they topped off the tank. But how much do you know about gasoline before it arrives at the pump? Or about mileage? Take our quiz to see how much of a fuel expert you are.

1. How much gasoline is produced from a barrel (42 gallons) of oil?

12 gallons

19 gallons

35 gallons

Oil companies consider the answer a secret

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