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Digital Factorial (Posted on 2013-07-01)

21!=510909x21y1709440000

Without calculating 21!, what are the digits marked x and y?

No Solution Yet Submitted by Danish Ahmed Khan

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Puzzle Answer

Comment 3 of 3 |

The digits marked x and y respectively correspond to 4 and 7.

***I sincerely hope to posit an independent explanation of my own in future.

Posted by K Sengupta on 2022-05-15 22:28:18

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