Question

select all the numbers that are prime.
7 11 5 19
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Explanation:

Step1: Recall Prime Definition

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

Step2: Check 7

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

Step3: Check 11

11 > 1. Divisors of 11: 1, 11. So prime.

Step4: Check 5

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

Step5: Check 19

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

Answer:

7, 11, 5, 19 (all selected numbers are prime as they meet the prime number definition)