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Are 21 and 22 prime

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โˆ™ 2011-02-24 13:32:32

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no because 21 can be divided by 3, 7, and itself now 22 is not a prime factor either because it can be divided by 2 and 11 and of course itself, And prime factor is a number that can only divided by 1 and itself

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โˆ™ 2011-02-24 13:32:32
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Factoring and Multiples

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What is the prime factorization of 24

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What is the prime factorization of 64

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Related questions

Which is the prime number 21 22 23 24 25 26?

21 22 23 24 which is the prime number


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23 is prime.


What is the exponentail form for the prime factorization of 22?

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The prime number is 24


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3 x 7 = 21 2 x 11 = 22 because 3 x 7 = 21 2 x 11 = 22


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What is the prime factorization of 21 and 60?

21 = 3 * 760 = 2 * 2 * 3 * 5 = 22 * 3 * 5


What are the six smallest keys that you can create by multiplying two different prime numbers?

They are 6, 10, 14, 15, 21, 22.They are 6, 10, 14, 15, 21, 22.They are 6, 10, 14, 15, 21, 22.They are 6, 10, 14, 15, 21, 22.


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You can work this out, Prime numbers can only be divided by themselves or 1. Therefore as 20 can be divided by 2 it it not prime. The same is true for 22 and 24. Thus the prime must be either 21 or 23. See if either of these numbers can be divided by 7, if it can then the prime must be the other number.


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I am not sure there is such a classification. It cannot be odd/even Odd numbers: 52 - 22 = 21 Even numbers: 52 - 32 = 16 It cannot be prime/composite Prime: 32 - 22 = 5 Composite: 52 - 22 = 21


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What is the prime of numbers 21 22 23 24 25 26 27 28 29 30 and why?

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Do you mean, "What is the prime factorization of 21?"


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The prime factors of 21 are 3,7.


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Is the number 21 prime composite or neither?

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