Which one of the following is not a prime numbers

- Which one of the following numbers is not a prime number 2 3 5 9
- Which one of the following prime numbers while dividing 2176 leaves 9 as remainder
- Which one of the following is a set of prime numbers
- Which one of the following number is not the sum of two prime numbers
- Which one of the following are prime numbers
- Which one of the following is a pair of co prime numbers
- Which of the following numbers are prime
- A prime number