Question

Tell whether the number is prime or composite. 15

Short answer

15 is a composite number.

Step-by-step solution

.Recall the concept of prime and composite numbers

Prime numbers are the numbers which are divisible by 1 and itself.

Composite numbers are the numbers which have factors other than 1 and itself.

Step-2- Find the factors of the given number

Observe that,

$\begin{array}{l}15÷\text{3}=5\\ 15÷5=3\end{array}$

Therefore, the factors of 59 are 1, 3, 5 and 15.

. Conclusion

Since 15 has factors other than 1 and itself, it is a composite number.