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