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The sum of any two prime numbers is not always a composite number. The sum of 2 and 11 is 13, and 13 is a Prime number, not a composite number.
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When is product of 2 prime numbers a prime number?
The product of two prime numbers is always a composite number, and it never is a prime number.
Why will a prime number times a prime number always equal a composite number?
the two prime numbers will be factors of that number, which would make that number a composite number
When you multiply two prime numbers the result is always a composite number?
That is correct.
Is the sum of two composite numbers also composite?
Not always as for example 20+9 = 29 which is a prime number
What is the opposite of a prime number?
The 'opposite' status of a number that is not prime is a composite number.Except for 0 and 1, all numbers that are not prime (i.e. they are multiples of other numbers) are called composite numbers.The opposite of a prime number would be a number that is not prime. Almost all numbers that are not prime are composite numbers. A prime number is a number that has exactly two factors. A composite number has more than two factors. However, composite numbers do not include all numbers that are not prime. The number 1 has only one factor, so it is neither prime nor composite - it is unity.
