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Digital Factorial (Posted on 2013-07-01) Difficulty: 2 of 5
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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  Subject Author Date
SolutionsolutionCharlie2013-07-01 14:23:57
SolutionOne way to reach a solution.Jer2013-07-01 11:20:38
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