GMAT Club Tests | Re: M12-04

Official Solution:

How many zeros does 100! end with?

A. 20
B. 24
C. 25
D. 30
E. 32


Trailing zeros in 100!:\(\frac{100}{5}+\frac{100}{5^2}=20+4=24\)

THEORY:

Trailing zeros:

Trailing zeros are a sequence of 0's in the decimal representation of a number, after which no other digits follow.

For example 125,000 has 3 trailing zeros;

The number of trailing zerosn! , the factorial of a non-negative integer\(n\) , can be determined with this