Across
- 6. A thousand million.
- 7. Square of three.
- 8. Half of ten.
- 9. Large round number.
- 11. A decade.
- 12. A trio.
- 15. Twelve items.
- 16. Double two.
- 17. Two times four.
Down
- 1. One with six zeros.
- 2. Half a dozen.
- 3. Endless number.
- 4. First number.
- 5. Nothing at all.
- 10. Lucky number.
- 13. Ten times ten.
- 14. A pair.