What psychiatrist developed the principal of "synchronicity"?

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In the Christmas song, The Holly and The Ivy which one bears the crown?

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In Judaism, what day of the week is considered a day of rest?

What original literary work was the movie "The Innocents" based on?

Who wrote the opera "The Giant"?

In Greek mythology, which monster had snakes for hair?

Who is the Greek Goddess of witchcraft and magic?

Which US state is home to Craters of the Moon National Monument?

Sofia is the capital of which nation?

One of the Midwest's "Quad Cities" is named for what three-mile-long island in the Mississippi?

What city is the capital of Djibouti?

What scifi series, which debuted in 1965, took place in the year 1997?

What year was the company "Hewlett-Packard" founded?

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What became the tallest building in London after its official opening in October 1965?