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by bblast » Thu Jul 28, 2011 10:26 pm
Hi,

The no of zeroes in 30! can be found by counting the no of 5's in 30 = 7

so the answer will directly depend on the value of M.

suppose m is 3 so our answer will be 7-3 = 4.
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by ruplun » Thu Jul 28, 2011 10:45 pm
why will i suppose the value of m to be 3?
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