Sets Terminology

12345678910111213141516171819202122
Across
  1. 5. The number of elements in a set, written #A
  2. 6. Another name for the set with nothing in it
  3. 10. The ___ set contains every element under consideration
  4. 12. A well-defined collection of distinct objects
  5. 14. Set Q: any number writable as one integer over another
  6. 15. Only the elements common to both sets
  7. 17. Number of overlapping circles in a Venn diagram with sets A, B and C
  8. 18. Diagram of overlapping circles used to show sets
  9. 19. Everything in the universal set that is not in A
  10. 20. Every one of its elements is also in the larger set
  11. 22. Two sets are ___ when they contain exactly the same elements
Down
  1. 1. All elements in A or B or both
  2. 2. The ___ numbers, set N, counting from 1
  3. 3. A minus B: in the first set but not the second
  4. 4. Set Z: whole numbers, positive, negative and zero
  5. 7. A set whose list of elements never stops, like the naturals
  6. 8. A single member of a set, written with the symbol in
  7. 9. A separate area of a Venn diagram
  8. 11. A number like root 2 that cannot be written as a fraction
  9. 13. A set whose elements can be counted and come to an end
  10. 16. The ___ set has no elements at all
  11. 21. Set R, containing every rational and irrational number