perplexus.info :: Just Math : Non

Non - Zero Digit II (Posted on 2012-02-05)

Reading from left to right, what is the last non - zero digit in ((20!)!)!? (That is, the factorial of factorial of 20 factorial).

No Solution Yet Submitted by K Sengupta

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8 (A Sengupta-style answer)

Posted by Steve Herman on 2012-02-05 14:33:04

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