Question

Select a counter-example that makes the conclusion false.

7 - 3 = 4, 8 - 5 = 3, 9 - 8 = 1

Conclusion: the difference of two positive numbers is always positive.

Counterexample:

Answer 1

2 - 7 = -5

Explanation:

This means that two positive numbers have given a difference of -5, so the conclusion above can not be true. In fact, subtracting a larger number from a smaller number will always give a negative result, so this conclusion isn't even true in most cases.

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Answer 2

Counter example : 3 - 7 = -4 , 5 - 8 = -3, 8 - 9 = -1



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