I need to find that the number of the 0's at the end of the number is odd or even in a factorial.
For example:
$0! = 1$ (Even)
$5! = 120 $ (Odd)
$18! = 6402373705728000 $ (Odd)
Dou you have any idea about this problem?
2026-03-25 17:33:21.1774460001
The Number of The 0's in a Factorial
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