Q: What is the final event of a men's decathlon?
What is the answer?

A: 1500 metres

Q: In astronomy what name is given to a star that flares up to many times its normal brilliance then fades back to obscurity?
What is the answer?

A: nova

Q: Washington DC stands on which river?
What is the answer?

A: potomac

Q: "What Oscar nominated 2010 movie was adapted from the book The Accidental Billionaires and advertised with the tagline ""You don't get to 500 million friends without making a few enemies""?"
What is the answer?

A:
social network