I'm posting one puzzle, riddle, math, or statistical problem a day. Try to answer each one and post your answers in the comments section. I'll post the answer the next day. Even if you have the same answer as someone else, feel free to put up your answer, too!
Friday, May 14, 2010
Friday Factorial
Can you think of a reason why 30414093201713378043612608166064768844377641568960512078291027000 cannot possibly be the value of 50 factorial, without actually performing the calculation?
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When 10,20,30,40,50 are multiplied itself the last five digits will be zero other than this there are five set of 5s and 2s.
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