Which number system uses only the symbols 1 and 0?

More Questions:

What name is given to a year with 366 days?

Margaret Munnerlyn Mitchell, author of the book "Gone with the Wind', was born in what city?

What is the capital of Bolivia?

What major river runs through Buenos Aires?

How many chromosomes does a cow have?

Karl Landsteiner won a Nobel prize in 1930 for which medical discovery?

What's the appropriate stage name of musician Richard Melville Hall?

What US state is Sheldon from the TV show "The Big Bang Theory" from?

Which 1979 film featured a space ship named "Nostromo"?

Which band member of Sublime died of a drug overdose?

In the movie "Reservoir Dogs', who keeps are razor blade in his boot?

Who became the 17th president, after Abraham Lincoln was assassinated?

When did the Massacre of Glencoe occur?

What hill in Athens does the Parthenon stand on?

Botswana is landlocked by which four countries?