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Earn +20 ptsQ: What is a prime factor of 12 and 21?
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Is 21 a prime factor?
no
What is the greatest common factor for 12 21 30?
The prime factors are: 12 = 2 * 2 *3 21 = 3 *7 30 = 2 * 3 * 5 So the greatest common factor is 3.
What prime number is a factor of 12 and 27?
The prime factors of 12 are 2 and 3. The only prime factor of 27 is 3. The prime number that both 12 and 27 have as a factor is 3.
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.
Is the prime number and prime factor the same definition?
It depends how its used. 3 is a prime number. 3 is a prime factor of 12.
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