Question

is 19 a prime number or a composite number? prime number composite number submit

Explanation:

Step1: Recall prime number definition

A prime number is a number greater than 1 that has no positive divisors other than 1 and itself.

Step2: Check divisors of 19

We test divisors from 2 to $\sqrt{19} \approx 4.36$. The numbers 2, 3, 4 do not divide 19 evenly (19 ÷ 2 = 9.5, 19 ÷ 3 ≈ 6.33, 19 ÷ 4 = 4.75). So 19's only divisors are 1 and 19.

Answer:

A. prime number