And 9000?
Also, I'll give you a clue: It isn't just the numbers in the list that are important, it's what the numbers relate to in real life.
Could you be a little more specific? That is incredibly vague.
Positive integers less than 49/at most 48?
Member: 47
Non member: 52
Numbers of Mann Co crates.
Member: 15
Non Member: 1.2