Question

which of the following numbers are prime? 19 3 5 7 submit

Explanation:

Step1: Recall Prime Definition

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

Step2: Check 19

19 > 1. Divisors of 19: 1 and 19. So prime.

Step3: Check 3

3 > 1. Divisors of 3: 1 and 3. So prime.

Step4: Check 5

5 > 1. Divisors of 5: 1 and 5. So prime.

Step5: Check 7

7 > 1. Divisors of 7: 1 and 7. So prime.

Answer:

19, 3, 5, 7 (all the checked numbers are prime as they meet the prime number definition: greater than 1 with only 1 and themselves as divisors)