31 and 47 are prime, the rest composite.
31
31, 37, & 41 are prime; 32,33,34,35,36,38,39 & 40 are composite.
3, 17 and 31 are all prime numbers.
31 is PRIME.
If you mean: 53 81 41 47 and 31 then 81 is a composite number while all the rest are prime numbers
51 is composite. 51 = 3 x 17. The other three numbers are prime numbers.
Prime; Are, 2,3,5,7,11,13,17,19,23,29
7, 31, 103 All three are prime numbers and not composite numbers.
95 and 24 are composite numbers and 31 is a prime number
31, 37, & 41 are prime; 32,33,34,35,36,38,39 & 40 are composite.
23 and 31 are prime. 36, 62 and 87 are composite.
1 and 3 are prime. 31 is prime.
21 is composite as 3 times 7 is 21 31 is prime
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?
Yes, those are prime numbers.
39 is a composite number 1 is neither prime nor composite number 31 and 41 are prime numbers.
23 and 31 are prime numbers whereas 52 33 60 and 25 are composite numbers.
29 and 31 are prime. The rest are composite numbers.