Game show host Alex Trebek rehearses his lines on the set of the "Jeopardy!" Million Dollar Celebrity Invitational Tournament Show Taping on April 17, 2010 in Culver City, California.
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Professional sports gambler and Jeopardy! champion James Holzhauer sounds a siren before the start of an NHL playoff game between the San Jose Sharks and the Vegas Golden Knights in April.
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What's the median age in Africa? To find out, take our quiz. Above: Crowds wait for a festival in Maiduguri. Bonus question: Where is Maiduguri? Answer: It's the capital of Boron State in northeastern Nigeria.
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Alex Trebek, host of TV quiz show Jeopardy!, says that for the most recent tryouts, contestants from Canada were not allowed due to concerns about the country's online privacy laws.