Comme un jeu

$ \definecolor{colordef}{RGB}{249,49,84} \definecolor{colorprop}{RGB}{18,102,241} $

Courses About

List the elements in the set $$A = \{n \in \N \mid n \text{ is a prime number less than } 20\}$$

$A = \{2, 3, 5, 7, 11, 13, 17, 19\}$
$A = \{1, 3, 5, 7, 9, 11, 13, 15, 17, 19\}$
$A = \{2, 4, 6, 8, 10, 12, 14, 16, 18\}$
$A = \{2, 3, 5, 7\}$