2nd Edit: This is the answer you're probably looking for; Reasoning: Previous answers: Yes, Edit: As requested, whole numbers!
Damn, I thought I had it with my first guess, here's a second: In some sports I can be used, but only by some. I can be used in some work, more specific than others. I'm not talking about animals or ...
2nd guess because First guess because
They were trying to: References in the riddle: