Prime Numbers and Composite Numbers: Identifying the prime number

Which of the numbers is a prime number?

$11$

Which of the numbers is a prime number?

$11$

Which of the numbers is a prime number?

$7$

Which of the numbers is a prime number?

$5$

Which of the numbers is a prime number?

$23$

Which of the numbers is a prime number?

$17$

Which of the numbers is a prime number?

$37$

Which of the numbers is a prime number?

$19$

Which of the numbers is a prime number?

$57$

Which of the numbers is a prime number?

$43$

Which of the numbers is a prime number?

$23$

Which of the numbers is a prime number?

$31$

Which of the numbers is a prime number?

$13$

Which of the numbers is a prime number?

$11$