Question about series?

Question

i am trying to do a report for my engineering study about the mobile and cell phones "scratch cards" my question is why we can not find two similar secruit number and is there some formula that they use to generate these cards or it is all about the " Data Base " in another word they enter various numbers and ask the user to match his card with it ,

one more thing can you help me with a web site that explain such athing.

with all my respect and thak

Eng.Samiem Caeser, " information and comunication engineering university of Baghdad ".

Answer 1

what is it about the cricket section? why is it that we get inundated with these questions that have absolutely nothing to do with cricket

dude, take your question to the right section!!

Answer 2

friend its a nice question.. but its a cricket section

Answer 3

i think it works with da help of data base....