always
Always
Whole numbers can never be irrational.
Prime factorization never includes a composite number. All numbers in prime factorization must be prime numbers.
The moon.
Sometimes
sometimes
Sometimes.
always
Sometimes true.
Always
The answer is sometimes - when the multiple in question is 1.
Sometimes.
The product of two prime numbers is always a composite number, and it never is a prime number.
Never.
Whole numbers can never be irrational.
Always even.