9 lines
299 B
Markdown
9 lines
299 B
Markdown
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In the 20×20 grid below, four numbers along a diagonal line have been marked in red.
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```
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...
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```
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The product of these numbers is 26 × 63 × 78 × 14 = 1788696.
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What is the greatest product of four adjacent numbers in the same direction (up, down, left, right, or diagonally) in the 20×20 grid?
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