31
Both. Because there are both even and odd prime numbers.
Both 3 and 5 are prime numbers. 3 x 5 = 15
There aren't any. 2 is the only even prime number, so no other even numbers can be prime. There can be no even numbers between 30 and 50 that are prime.
There is only one even, prime number. It is two (2).
No. Two numbers are relatively prime if they have no prime factors in common. Two even numbers will have 2 as a prime factor in common.
2 is the only prime even number.
2, which is the only even prime number that there is.
Only one number can be both even and prime, and that is the number 2.
All numbers greater than 2 are composites, not prime numbers.
No.
You can still do math if two numbers in a equation are not prime for example 4+9 can be solved even though they are not prime, but composite numbers.
2 is the only member of both the set of all prime numbers and the set of all even numbers.