Sets Symbols

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Across
  1. 3. Set with no element in common
  2. 6. The numbers starting from 0 upwards
  3. 10. Number that cannot be expressed as a ratio of integers
  4. 12. Portion of a set
  5. 14. Set which contains all objects, including itself
  6. 15. Member of a set
Down
  1. 1. Collection of sets
  2. 2. Empty set
  3. 4. The whole numbers from 1 upwards
  4. 5. Numbers including all rational and irrational numbers
  5. 7. Number that can be written as a ratio of integers
  6. 8. Elements not in that particular set
  7. 9. Whole numbers that can be positive, negative or zero
  8. 11. Set of elements common, in other sets
  9. 13. Collection of objects