publication date: Thursday, July 23, 2020 (part of Summer 2020)

category: Business

clue: When his friend invented soft-serve ice cream, he knew it would be a best-seller in his royal restaurant when he couldn't give it away fast enough.

explanation: Noble founded Dairy Queen. His first attempt at soft-serve was an "all you can eat for 10 cents" promotion; he sold 1600 servings in the first two hours. more…

difficulty: medium

solved by: Russ Wilhelm, Steve West, Samir Mehta, LaVonne Lemler, Chris Lemler, Denise Sawicki, and Erik Bates


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