locking for my important number

Solution
I'd say 0 is an important number. Without it we'd be stuck with roman numerals or only being able to count 1-9. Pi is also a big one in importance. Also whatever the winning lottery numbers for Power Ball, very important numbers if you could know them in advance.

That's about as far as we can go with the information you provided.
I'd say 0 is an important number. Without it we'd be stuck with roman numerals or only being able to count 1-9. Pi is also a big one in importance. Also whatever the winning lottery numbers for Power Ball, very important numbers if you could know them in advance.

That's about as far as we can go with the information you provided.
 
Solution