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 | Czech Republic | Liechtenstein | Switzerland
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?
Yellow | White | Blue | Red
In which century did the United States of America begin using decimalised currency?
1900s | 1600s | 1800s | 1700s
In what year was the first Christmas stamp issued in the United States?
1945 | 1850 | 1962 | 1971
Which law in gas dynamics states that at a constant temperature, the pressure of a gas is inversely proportional to its volume?
Boyle's Law | Charles' Law | Avogadro's Law | Gay-Lussac’s Law
Which four U.S. states have borders along Lake Erie?
Wisconsin, Illinois, Indiana, Michigan | Michigan, Ohio, Pennsylvania, New York | Michigan, Indiana, Ohio, Kentucky | Illinois, Indiana, Michigan, Ohio
