The Numbers

12345678910111213141516171819
Across
  1. 4. Six
  2. 5. Fourtee_
  3. 6. T_elve
  4. 10. Eigh_een
  5. 12. Sev_nteen
  6. 15. S_xteen
  7. 16. On_
  8. 18. Thr_ _
  9. 19. S_ven
Down
  1. 1. Four
  2. 2. N_n_teen
  3. 3. Fift__n
  4. 6. T_ent_
  5. 7. _ight
  6. 8. Fi_e
  7. 9. N_ne
  8. 11. Ten
  9. 13. T_o
  10. 14. Elev_n
  11. 17. Thirt__n