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.
2 is the only even number that is prime, so all other even numbers are composite.
Not all composite numbers are even, but all even numbers except 2 are composite.
44 is an even number. All even numbers except 2 are composite numbers, so 44 is composite.