In which European country is it customary to hide a pickle ornament in the Christmas tree?

Which of the following services is commonly offered by the Big Four accounting firms?

Who painted the "Starry Night"?

In which year did Roger Federer win his first Wimbledon title?

What is the name of the Norse god of thunder?

Who wrote "The Origin of Species"?

In which country is the headquarters of Nokia located?

What is the currency of Japan?

Who was the first woman to win a Nobel Prize?

In which sport would you perform a slam dunk?

Which is the oldest underground railway network in the world?

Which tech giant was originally known as "Blue Ribbon Sports"?

In the song "The Twelve Days of Christmas," what gift is given on the seventh day?

What is the name of the longest highway in the world?