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  • 26-01-2021
  • Mathematics
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Which of these numbers is a prime number: 1, 11, 21, 51?

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  • 27-01-2021

Answer:

11 and 51

Step-by-step explanation:

1 technically isn't a prime since a prime can only be divided by two things (itself and 1) and 1 can only be divided by 1.

21 can be divided by 1, 3, 7, and 21 so it is not prime.

Hope this helps!

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