That is correct.
No, 13 is a prime number and 15 is a composite number. A composite number is a positive integer that has more than two positive divisors.
Prime: 13, 23, 31 Composite: 15, 18, 51, 66, 81
11 and 13 are prime numbers but 15 is a composite number because it has more than two factors
169 is composite because if you do (13*13) it on a calculator then you will figure out that 169 is composite.
15 is composite.
No, 13 is prime.
2 is a prime number and 15 is a composite number.
47 is a prime, the other two are composite.
composite
Composite.
It is a prime.
3 is prime 15 is composite