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Earn +20 ptsQ: Is 21 a prime factor
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Is 21 a factor of a prime number?
No. The only factors of a prime number are 1 and itself. The only way that 21 could be a factor of a prime number is if it were a prime number, but it is not because 21 is also divisible by 3 and 7.
What is a prime factor of 12 and 21?
3
What prime number is a factor of 21?
3 and 7
What number is it has 90 as a factor thre number is prime 21 is the multiple of the number?
If 21 is a multiple of the number, the number cannot have 90 as a factor.
Which number is a factor of 21 and also a prime number?
3 and 7
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