Question

Which are prime numbers? 1,2,3,4,5,6,7,8,9,10,11,12,13,14,1,16,17,18,19,20,21,22,23,24

Answer 1

2, 3 5, 7, 11,13,17,19, 23

Answer 2

Prime number are numbers you can only divide by 1 and the number itself :)