Question 26
If $n$ is a positive integer, $n!$ is found by multiplying the integers from 1 to $n$. For example, $4!=4\times3\times2\times1=24$.
What are the three rightmost digits of the sum $1!+2!+3!+\cdots+2020!$?
What are the three rightmost digits of the sum $1!+2!+3!+\cdots+2020!$?