An elderly woman walked into the local auto parts store. She said to the clerk: "I need a new Seven-Ten cap for my car. Mine broke, it goes on top of the engine." The clerk, clearly confused, asked if she could draw a picture of what it looked like. The lady proceeded to draw a circle, with the number Seven-Ten in it. The clerk fell on the floor laughing. To get the joke, you have to try it yourself. Draw a circle, write the number seven-hundred and ten in it, then turn it upside down... :)