13 prime
63 composite
61 prime
31 prime
Well the question should have been either, Which one of these numbers is not a composite number? Or, Which one of these numbers is not a Prime number?
93 is composite.
63 is composite.
31 is prime.
31 is prime.
51 is composite.
93 is composite.
63 is composite.
39 is a composite number 1 is neither prime nor composite number 31 and 41 are prime numbers.
31 is prime.
Composite. Its prime factors are 23 and 31.
No, it is a prime number.
31 and 61 are prime, the rest composite.
31 is prime.
31 is prime.
31 is a prime number
It is a prime.
91 is composite.