Kyriejr30
Kyriejr30
16-01-2018
Mathematics
contestada
which of these is a prime number 1,11,21,51 ?
Respuesta :
shaniam05
shaniam05
16-01-2018
11,,21,51 are all prime numbers
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mathstudent55
mathstudent55
16-01-2018
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.
Answer Link
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