Roman Numerals

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Across
  1. 3. What number president is Donald Trump?
  2. 5. 100-60=?
  3. 6. 40/20=?
  4. 7. 23
  5. 11. one hundred sixty six
  6. 14. fifteen
  7. 16. 17
  8. 17. Quasquincentennial is how many years?
  9. 18. Number of planets in the solar system.
Down
  1. 1. 1550
  2. 2. What year is it?
  3. 3. 12
  4. 4. How many continents are there?
  5. 8. thirteen
  6. 9. How many wheels does a bike have?
  7. 10. 10+10=?
  8. 12. 74
  9. 13. What percent of Earth is water?
  10. 15. At what age do you get your license?
  11. 19. A duo has how many people?