Asked by Shaakira
                Find the remainder when 1!+2!+...+299!=300! is divided by 21 using mod 0 in base 21.
            
            
        Answers
                    Answered by
            MathMate
            
    See solution to the same problem at:
http://www.jiskha.com/display.cgi?id=1343870534
and
http://www.jiskha.com/display.cgi?id=1343870950
    
http://www.jiskha.com/display.cgi?id=1343870534
and
http://www.jiskha.com/display.cgi?id=1343870950
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