The clue is: A popular quiz-show that is doubling its prize money for the first time in nearly 20 years?

The correct answer: What is Jeopardy!

Starting the last week of November, those $100 questions will be worth $200, $500 questions will be $1,000 — and Double Jeopardy will pay, well, double that. 

"Our contestants work very hard and they deserve a raise," Jeopardy! executive producer Harry Friedman told The Post

According to Friedman, the move is a direct response to the mega-jackpots that have become everyday occurrences on newer quiz-shows like The Weakest Link and especially Who Wants to be a Millionaire, which sends away its champions with a million-dollar prize. 

Jeopardy! officials may be feeling particularly vulnerable this season because Link is set to go into syndication in January and Millionaire next fall. Both may eventually be competing directly against Jeopardy! 

"We're like any other business, you deal with market conditions," Friedman said. 

"It's not going to change the content of the show. The competition will still be very tough and the material will still be uniquely Jeopardy!, but now there's more money at stake, which will create more excitement," he said. 

The average Jeopardy winner used to take home about $11,000. "We're a game show," Friedman said. "And part of what we do is give away money. How bad can that be to give away more? 

"It's likely now that the five-time champions on Jeopardy! will likely win in the realm of $100,000," Friedman said. 

Friedman, who also oversees Wheel of Fortune, said that show is also upping its jackpot this season. 

Starting Oct. 22, Wheel will add a bonus round to that game as well. In the round, contestants will get to spin a new wheel for a chance to win up to $100,000 or a car. 

"That's the most we've ever given away on that show," Friedman said. "We've been upgrading that show for years, we give away $6 million to $7 million a year on Wheel." 

Meanwhile, there are more surprises in store for Jeopardy! fans this year — host Alex Trebek has lost his mustache for good. 

Trebek shaved his signature ‘stache at the end of last season during a lunch break between taping shows and surprised his studio audience.

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