Question

What is a counterexample for 7 - 3 = 4, 8 - 5 = 3, 9 - 8 = 1

Answer 1

5 - 8 = -3

Explanation:

The counterexample must be to a conclusion that is stated.

Assume the conclusion is:

The difference of 2 positive integers is always positive number.

The three given examples do follow the conclusion.

Here is a counterexample that proves the conclusion to be false.

5 - 8 = -3

Here, the difference of two positive numbers, 5 and 8, is a negative number.

Answer: 5 - 8 = -3