Question

-Question Worth 20 points!!-

If a number is greater than 7, it is greater than 11. Which of the following is a COUNTEREXAMPLE to this statement?

A. 9

B. 5

C. 13

D. 15

Answer 1

A. 9

Explanation:

A counterexample shows that one side is true while the other is false

x>7 and x>11

sub in the answers

9>7 and 9>11 -this is true for the first half but false for the second

5>7 and 5>11 -this is false for both

13>7 and 13>11 -this is true for both

15>7 and 15>11 -this is true for both

Answer A is correct as it proves the statement to be incorrect