Question: Choose all the prime numbers.
Choose all that apply • 5 points
top-left: checkbox with $2$
top-left: checkbox with $9$
top-left: checkbox with $12$
top-left: checkbox with $15$
top-left: checkbox with $19$
top-left: checkbox with $23$
1. The problem asks us to identify which numbers from the list are prime numbers.
2. A prime number is a natural number greater than 1 that has no positive divisors other than 1 and itself.
3. Let's check each number:
- $2$: Divisors are 1 and 2 only. So, $2$ is prime.
- $9$: Divisible by 1, 3, and 9. Since it has a divisor other than 1 and itself, $9$ is not prime.
- $12$: Divisible by 1, 2, 3, 4, 6, and 12. Not prime.
- $15$: Divisible by 1, 3, 5, and 15. Not prime.
- $19$: Divisible only by 1 and 19. Prime.
- $23$: Divisible only by 1 and 23. Prime.
4. Therefore, the prime numbers in the list are $2$, $19$, and $23$.