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Is 21 a primenumber

Updated: 9/20/2023
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Q: Is 21 a primenumber
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What is the 1000th primenumber?

7919


Is 5 a primenumber?

Yes.


How many factors does a primenumber have?

Two.


Is 87 a primenumber?

Nope - it can be divided by 3.


Why isn't one a primenumber?

It doesn't have two factors.


Is 28 a primenumber?

No, it is an even number and therefore can be at least divided by 2.


Give three primenumber whose differense is 2?

3, 5, and 7.


What is eleven twelfths simplified?

11/12 cannot be simplified - because 11 is a primenumber.


What is simplest form for 67 over 90?

It's already in its simplest form - 67 is a primenumber.


What is 18 over 29 in simplest form?

18/29 cannot be simplified - because 29 is a primenumber !


Is -2 primenumber or not?

I could bore you with a long mathematical explanation (ask if you want one), but to simplify things, 2 is a prime number.


What is 12 over 43 in simplest form?

It's already in its simplest form - since 43 is a primenumber.