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.
If 15 men take 21 days of 8 hours each to do a piece of work. How many days of 6 hours each would 21 women take, if 3 women do as much work as 2 men?
If you take a 3 X 3 X 3 Rubik cube and break it up into 27 cubes, how many cubes would have stickers on exactly 2 faces ?
