Question

How many zeros are there in the product of the integer from 1 to 100?

Answer 1

24  

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Method 1:

$\boxed{\large\bold{zeros.in.n! = [\frac{n}{5} ]+[\frac{n}{5^2}]+[\frac{n}{5^3} ]+.....}}$

$\boxed{\large\bold{20+1=24}}}$