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Select a counter-example that makes the conclusion false.. . 3 is prime, 5 is prime, 7 is prime. . Conclusion: All odd numbers are prime.. . Counterexample:.

User Pmr
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Answer:

9 is an odd number but isn't a prime number.

User Brokkr
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We must select a counter-example that makes the conclusion false.

3 is a prime, 5 is a prime, and 7 is a prime.
The conclusion is that all odd numbers are prime numbers.
A counter example is that 9 is an odd number but it is NOT a prime number.
User Raimondo
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