15 yes, 13 no.
15
It is 15 because it has more than two factors
9 and 15 are composite numbers because they have more than two factors
15 is composite.
15 is a composite number - it can be divided by 3 and 5. 11, 13, 17 and 19 are all prime numbers, not composite.
15 is composite.
15
15!
No, 13 is not a composite number.
It is 15 because it has more than two factors
9 and 15 are composite numbers because they have more than two factors
15 is a composite number. 11 is a prime number.
15 is composite.
15 is a composite number - it can be divided by 3 and 5. 11, 13, 17 and 19 are all prime numbers, not composite.
(2X3X5X13X17) + 13 = 6643 This is a composite number.
No 13 is not a composite number. 13 is only divisible by 1 and itself. So it is a prime number.
11 and 13 are prime numbers but 15 is a composite number because it has more than two factors