Across
- 1. one
- 3. one billion bytes
- 7. mythical creature with one horn
- 8. figure with 8 sides
- 9. twice
- 11. four children born at one birth
- 14. figure with 7 sides
- 15. two-wheeled vehicle
- 16. 100
- 17. noon
- 18. half of a sphere
- 19. sea creature with 8 arms
Down
- 1. one million tons
- 2. XV
- 4. train that rides on one track
- 5. 1,000 years
- 6. figure with five sides
- 10. trimester
- 12. 10 years
- 13. athletic contest with 3 events