Which desert is on the US-Mexico border?
Which is the only US state to border one other state?
Which is the smallest country that shares a border with Austria?
Slovakia | Switzerland | Liechtenstein | Czech Republic
What is the official motto of the United States?
What is the oldest university in the United States?
What colour are the stars on the United States flag?
White | Yellow | Blue | Red
In which century did the United States of America begin using decimalised currency?
1800s | 1600s | 1700s | 1900s
In what year was the first Christmas stamp issued in the United States?
1850 | 1962 | 1945 | 1971
Which law in gas dynamics states that at a constant temperature, the pressure of a gas is inversely proportional to its volume?
Avogadro's Law | Charles' Law | Boyle's Law | Gay-Lussac’s Law
Which four U.S. states have borders along Lake Erie?
Michigan, Ohio, Pennsylvania, New York | Wisconsin, Illinois, Indiana, Michigan | Illinois, Indiana, Michigan, Ohio | Michigan, Indiana, Ohio, Kentucky
