Across
- 3. 40-48-56...
- 4. 9-18-27...
- 7. 6-9-12...
- 10. 2-4-6...
- 11. 35-40-45...
- 15. 4-8-12...
- 16. 50-60-70...
- 17. 5-10-15
Down
- 1. 20-25-30...
- 2. 4-5-6...
- 3. 30-40-50...
- 5. 8-12-16
- 6. 21-28-35...
- 8. 49-56-63...
- 9. 9-12-15...
- 12. 16-24-32...
- 13. 35-42-49...
- 14. 18-24-30...