Joke Collection Website - Mood Talk - Is the following statement correct? Please tell me your reasons.
Is the following statement correct? Please tell me your reasons.
(1) All prime numbers are composite numbers. (Wrong) Reason: Prime number and composite number are two opposite concepts
(2) Product or composite number of two composite numbers. (Correct) Reason: Judging whether the sum of two prime numbers is prime number according to the definition of composite number. (Wrong) Reason: 3 and 5 are prime numbers, but 8 is composite number
(4) All composite numbers. There is no factor in a prime number. (Wrong) Reason: The factor of a prime number is 1 and it is < P > itself. So far, there is no general formula for judging prime numbers and composite numbers, and verification method is generally adopted.
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