Respuesta :
A prime number has exactly 2 different factors, 1 and itself.
11 is divisible only by 1 and 11.
11 is prime.
21 and 51 have a least three factors. They are not prime.
1 has only 1 factor. 1 is not prime.
11 is divisible only by 1 and 11.
11 is prime.
21 and 51 have a least three factors. They are not prime.
1 has only 1 factor. 1 is not prime.