No, they can have all odd digits, like 9, 15, 33, 35, 39 and so on.
710 is a composite number, as are all even numbers.
All even numbers, with the exception of the number 2, are composite numbers.
2 is the only even number that is prime, so all other even numbers are composite.
44 is an even number. All even numbers except 2 are composite numbers, so 44 is composite.
It is a composite number. It is an even number, so it is divisible by 2. The only even number that is a prime number is 2. All other even numbers are composite numbers.
All the even numbers except 2 are composite numbers. 512 is an even number so, it is a composite number.
60 is an even composite number. It ends with 0, making it an even number, and all even numbers over 2 are composite numbers.
All even numbers greater than 2 are composite numbers, and 2304 is an even number.
710 is a composite number, as are all even numbers.
All even numbers greater than 2 are composite numbers, and 858 is an even number.
All even numbers, with the exception of the number 2, are composite numbers.
849670 is a composite number. All even numbers over 2 are composite numbers.
All even numbers (except zero and two) are composite.
All even numbers (except 2) are composite numbers.
Not all composite numbers are even, but all even numbers except 2 are composite.
2 is the only even number that is prime, so all other even numbers are composite.
44 is an even number. All even numbers except 2 are composite numbers, so 44 is composite.