an unknown quantity in a sentence

Examples

1. Chad Pennington, a rookie this season, is still an unknown quantity.
2. But the Dakar Lions are no longer an unknown quantity in international soccer.
3. The moderate Islamic party called Hamas remained an unknown quantity in the voting.
4. As for his politics, especially foreign policy, he remains largely an unknown quantity.
5. An unknown quantity of explosives was also part of the shipment, it said.
6. The statement said an unknown quantity of contraband goods were seized.
7. Taylor, I don't know because he's still an unknown quantity.
8. Four years ago, he was an unknown quantity, easily tarred as an unfeeling archconservative.
9. The team is still a bit of an unknown quantity.
10. Kabila, a one-time Marxist and discipline of Che Guevara, remains largely an unknown quantity.