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Shared by the X account Brainy Quiz, this teaser features a 3×3 grid filled with numbers. The top row reads 4, 9, 2; the middle row has 3, 5, 7; and the bottom row shows 8, 1, with the third ...
The researchers didn’t actually fill an infinite grid. They didn’t have to. Instead, it’s enough to take a small subset of the grid — say a 10-by-10 square — fill that with numbers, then show that ...
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