Question

State the following as prime or composite: 15

Answer 1

prime number: A number that has only two factors 1 and itself.

composite number: A number that is not prime except 1.

We have,

$$\begin{gathered} 15=15\times 1 \\ 15=5\times 3 \end{gathered}$$

15 has more than 2 factors

Hence, 15 is a composite number.