**Five.** It works out that a mechanic can repair 1 car in an hour. Five mechanics could actually repair 25 cars in 5 hours, but 4 mechanics would be able to repair no more than 20 cars, so there would need to be at least 5 mechanics for 22 cars.

+3 votes

If it takes 2 garage mechanics 3 hours to repair 6 cars, how many mechanics would it take to repair 22 cars in 5 hours?

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