Discussion
Which of the following statements is not correct ?
Answer: A
The statement that is not correct is all prime numbers are odd numbers.
2 is a prime number, since its only factors are 1 and itself, and it is even. It is the only even prime, so the statement fails.
The other statements are true. Euclid proved that there are infinitely many primes. A prime has exactly two factors, 1 and itself. The single-digit primes are 2, 3, 5 and 7, exactly four.
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