A tricky math problem aimed at nine-year-olds has left grown-ups scratching their heads. The question, which involves adding and subtracting numbers in a diamond-shaped grid, has sparked a lively ...
Was this a hard math problem, or did you get the answer right? To open this safe, you have to replace the question marks with ...
Anna Kirchgater Elementary School took the next step in winning a potential $100,000 top prize in The Prodigy National Cup.
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