Across
- 2. a+b = b+a
- 4. counting numbers
- 8. repeated addition
- 10. the multiplicative inverse of a number
- 13. how many digits are in base 2?
- 16. a group of distinct objects; well-defined
- 17. describes where a number is in a sequence
- 20. all whole numbers and their opposites
- 21. more than two factors
- 26. numbers divisible by two
- 27. exactly two factors, one and itself
- 28. is 81 square rooted a perfect square?
- 29. sets that have no members in common
- 31. sequence of digits identifying something
Down
- 1. infinite set that starts at 0
- 3. the distance away from zero
- 5. the inverse operation of subtraction
- 6. is 896 divisible by 6?
- 7. a set with nothing in it
- 9. a binary system
- 11. square root of 16 = 4, of 9 = 3
- 12. the inverse operation of addition
- 14. numbers not divisible by 2
- 15. Convert 110111 from base 2 to base 10
- 18. all rational and irrational numbers
- 19. the result from the addition of 2 numbers
- 22. a number which is added to another
- 23. all the members two sets have in common
- 24. how many numbers are in a set
- 25. repeated subtraction
- 30. the merging of two sets