How intelligent are you?

Answer a few REALLY tough questions and see how intelligent you are. Good luck!

1 What does E=MC2 stand for?
2 Which of the words below means "a word that imitates the sound it represents"?
3 What is the dictionary used for?
4 Which of the following would be considered a "Historical Fiction?"
5 To be a genius, you must also have knowledge of 'slang'. What does 'fag' mean in England?