Question

A computer virus is eating disk space. during the first day it eats 1/2 of the disk. during the second day, it eats 1/3 of the remaining disk space. the third day it eats 1/4 of what still remains and the fourth day it eats 1/5 of what is left. what fraction of the original disk space remains intact?

Answer 1

1/120. First you do 1/6 * 1/4 then that would be 1/24 * 1/5 which would give you 1/120