Across
- 1. a type of flawed reasoning in writing proofs
- 4. an integer that is only divisible by 1 and itself
- 6. statements that are assumed to be true
- 10. a proof method that shows a something for all elements in a set
- 11. tells whether a number is even or odd
- 14. the study of formal reasoning
- 15. a propositional statement that always true
- 16. a statement that can be proven to be true
- 17. the "if" in an if-then statement
- 18. a ____ statement is about all the elements of a set
- 19. a phrase that means "greater than or equal to"
Down
- 2. an integer that is not prime
- 3. a statement that is either true or false
- 5. a number greater than or equal to zero
- 7. a word used in proofs to introduce a new variable
- 8. a number than can be written as a/b where b does not equal zero
- 9. an if-then statement is a ______ statement
- 10. ______ statements assert an object with certain properties exists
- 12. another word for divisor
- 13. if x divides y, then y is a _____ of x