The Sun newspaper is giving away four Apple 500MHz G4 Titanium PowerBooks.
To enter, readers have to answer the question: "How thick are G4 laptops?" The answer, of course, is one inch.
Lines for the competition close at 7.45pm tonight. Four winners will be randomly selected and contacted before 8pm. Calls cost 60p a minute (58p from the Republic of Ireland). To enter, ring 09015 613112.