If you can remember that there are 1024 megabyte in a Gigabyte and there are 1024gb in a Terabyte then you could work out how many Terabytes are in a Petabytes, Exabytes, Zettabytes and even Yottabytes.
this is a competition I was doing and only had 5 mins to get the answers so my friend could post the cards in for me,anyway it went right over my head,this stuff really confuses me,thank you dizmouk