5)What is the common factor between Madonna, Eleanor of Aquitaine, The Penny Black, & Jude Law. 6)The common factor between Troy, Battle of Hastings, Sir Robert Watson Watt, & Lewis Hamilton. (Have a hunch that no 5 might be something to do with the Beatles, but I need to be more specific. Could no 6 be something to do with rugby-again, need to be more specific!)