unknown quantity in a sentence

Examples

1. I'm still a little bit of an unknown quantity.
2. To Pacific Lumber employees, Hurwitz is an unknown quantity.
3. Schwartz shouldn't have been such an unknown quantity.
4. To most people, Koehler is an unknown quantity.
5. In 2007, the Raiders were an unknown quantity.
6. But O'Neal is an unknown quantity right now.
7. Given unknown quantities a, b, c and n:
8. He is an unknown quantity in Sierra Leone.
9. An unknown quantity of arms was seized.
10. He is sort of a known-unknown quantity.