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Can You Guess the Missing Number?

By: HowStuffWorks.com Contributors | Sep 1, 2021

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math game

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Answer

9, each number at the bottom is the sum of the three numbers directly above it.

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HowStuffWorks.com Contributors "Can You Guess the Missing Number?" 1 September 2021.
HowStuffWorks.com. <https://entertainment.howstuffworks.com/leisure/online-games/missing-number-game-3.htm> 7 August 2022

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