Mathematical Terms Puzzle Number 1

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Across
  1. 3. ---- Numbers (counting numbers plus zero)
  2. 5. >
  3. 7. ---- Number (a number with more than two factors)
  4. 8. ---- Number (a number divisible by only itself and 1)
  5. 12. (counting numbers + their opposites + zero)
  6. 13. ---- Numbers (numbers greater than zero)
  7. 15. ---- Numbers (counting numbers)
  8. 16. ≤
  9. 19. ---- Numbers (numbers less than zero)
  10. 20. List of objects in a set
Down
  1. 1. ---- numbers (a/b, where a & b are integers and b is not zero)
  2. 2. =
  3. 4. ≥
  4. 6. ≄
  5. 9. ---- numbers that are non-repeating infinite decimals
  6. 10. ∊
  7. 11. <
  8. 14. ---- Numbers (numbers **not** divisible by 2)
  9. 17. ---- Numbers (numbers divisible by 2)
  10. 18. Collection of objects